Additives

Items 193 to 240 of 524 total

Keeping your aquarium in tip-top shape is easy with this incredible assortment of high-quality additives. While some online retailers carry only a handful of additives, at Big Al’s Pets, we offer over 300 different types for your aquarium. These aquarium additives make it easy to keep the water clear and conditioned so your fish stay healthy and happy. Plus, many of our products are on sale at any given time, so it’s easy to keep your tank in great shape while keeping some extra money in your wallet.

Our helpful categories make it easy to narrow down your choices from this vast selection of products. You can quickly choose between biological, freshwater and marine additives to get the correct match for your fish. In addition, you’ll find helpful products like pH buffers and controllers, water clarifiers and water conditioners, all of which will contribute to a healthier underwater habitat for your pets.
  • Kordon NovAqua Plus - 4 fl oz
    • A new total reformulation of a trusted water conditioner
    • Detoxifies chlorine, chloramine, and heavy metals
    • Eliminates copper ions and other toxic elements
    • Adds and replenishes natural protective skin slime
    • Creates a buffer, helping to acclimate new inhabitants

    Regular Price: USD 3.99

    Sale Price USD 2.99

    Regular Price: USD 3.99

    Sale Price USD 2.99

    Out of stock

  • Kordon NovAqua - 5 gal
    • Detoxifies chlorine, chloramine, and heavy metals
    • Eliminates copper ions and other toxic elements
    • Adds and replenishes natural protective skin slime
    • Creates a buffer, helping to acclimate new inhabitants
    • Reduces stress for fish in times of strain or anxiety

    Regular Price: USD 199.99

    Sale Price USD 159.99

    Regular Price: USD 199.99

    Sale Price USD 159.99

  • API Quick Start - 1 fl oz
    • Contains nitrifying bacteria to help prevent fish loss
    • This immediately starts the natural aquarium cycle
    • Converts toxic ammonia into nitrites then to nitrates
    • Instantly add fish in marine & freshwater set-ups
    • Use when either ammonia or nitrite are detected
    USD 2.56
    USD 2.56
  • Seachem Reef Buffer - 20 kg
    Description Coming Soon!
    USD 248.34
    USD 248.34
  • Python Multi-Purpose Bio-Clean - 1 fl oz
    • Breaks down organic waste in aquarium water
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 1 fl oz of solution treats 60 U.S. gal of aquarium water
    • Part 3 of the Python three step water treatment system

    Regular Price: USD 2.99

    Sale Price USD 1.49

    Regular Price: USD 2.99

    Sale Price USD 1.49

  • Kordon Amquel - 8 fl oz
    • The Original AmQuel Product For Chlorine, Chloramine, And Ammonia Removal
    • A True One-step Liquid Chlorine, Chloramine, And Ammonia Remover
    • Nontoxic To Fishes, Aquatic invertebrates, And Other Aquatic Life
    • Fast Acting Within Five Minutes, Simple To Use
    • Effective In Removing Toxic Pheromones From The Water

    Regular Price: USD 6.99

    Sale Price USD 3.99

    Regular Price: USD 6.99

    Sale Price USD 3.99

    Out of stock

  • Kordon Amquel - 1 gal
    • The Original AmQuel Product For Chlorine, Chloramine, And Ammonia Removal
    • A True One-step Liquid Chlorine, Chloramine, And Ammonia Remover
    • Nontoxic To Fishes, Aquatic invertebrates, And Other Aquatic Life
    • Fast Acting Within Five Minutes, Simple To Use
    • Effective In Removing Toxic Pheromones From The Water

    Regular Price: USD 39.99

    Sale Price USD 29.99

    Regular Price: USD 39.99

    Sale Price USD 29.99

    Out of stock

  • Kordon NovAqua - 8 fl oz
    • Detoxifies chlorine, chloramine, and heavy metals
    • Eliminates copper ions and other toxic elements
    • Adds and replenishes natural protective skin slime
    • Creates a buffer, helping to acclimate new inhabitants
    • Reduces stress for fish in times of strain or anxiety

    Regular Price: USD 7.99

    Sale Price USD 3.99

    Regular Price: USD 7.99

    Sale Price USD 3.99

  • Kordon NovAqua - 1 gal
    • Detoxifies chlorine, chloramine, and heavy metals
    • Eliminates copper ions and other toxic elements
    • Adds and replenishes natural protective skin slime
    • Creates a buffer, helping to acclimate new inhabitants
    • Reduces stress for fish in times of strain or anxiety

    Regular Price: USD 69.99

    Sale Price USD 39.99

    Regular Price: USD 69.99

    Sale Price USD 39.99

  • Kordon NovAqua - 16 fl oz
    • Detoxifies chlorine, chloramine, and heavy metals
    • Eliminates copper ions and other toxic elements
    • Adds and replenishes natural protective skin slime
    • Creates a buffer, helping to acclimate new inhabitants
    • Reduces stress for fish in times of strain or anxiety

    Regular Price: USD 13.99

    Sale Price USD 7.99

    Regular Price: USD 13.99

    Sale Price USD 7.99

  • Red Sea Reef Mature Pro Kit
    • Complete biological maturation program for reef aquariums
    • Accomplish full nitrification, nitrate & phosphate reduction
    • Promotes the growth of coralline algae & other micro fauna
    • This pro kit will create & support colonies of anoxic bacteria
    • This 3.38 fl oz (total) kit will support systems up to 65 gallons
    USD 31.99
    USD 31.99
  • Python Multi-Purpose Water Conditioner - 67.6 fl oz
    • Makes tap water safe for aquarium usage by neutralizing toxins
    • Designed for use with freshwater and marine aquariums
    • Herbal extracts help to calm fish and relieve stress
    • 67.6 fl oz of solution treats 4.000 U.S. gal of aquarium water
    • Part 1 of the Python three step water treatment system

    Regular Price: USD 19.99

    Sale Price USD 8.49

    Regular Price: USD 19.99

    Sale Price USD 8.49

  • Python Multi-Purpose Water Conditioner - 4 fl oz
    • Makes tap water safe for aquarium usage by neutralizing toxins
    • Designed for use with freshwater and marine aquariums
    • Herbal extracts help to calm fish and relieve stress
    • 4 fl oz of solution treats 240 U.S. gal of aquarium water
    • Part 1 of the Python three step water treatment system

    Regular Price: USD 2.99

    Sale Price USD 1.49

    Regular Price: USD 2.99

    Sale Price USD 1.49

  • Python Multi-Purpose Water Conditioner - 16.2 fl oz
    • Makes tap water safe for aquarium usage by neutralizing toxins
    • Designed for use with freshwater and marine aquariums
    • Herbal extracts help to calm fish and relieve stress
    • 16.2 fl oz of solution treats 960 U.S. gal of aquarium water
    • Part 1 of the Python three step water treatment system

    Regular Price: USD 7.99

    Sale Price USD 4.49

    Regular Price: USD 7.99

    Sale Price USD 4.49

  • Python Multi-Purpose Water Conditioner - 1 fl oz
    • Makes tap water safe for aquarium usage by neutralizing toxins
    • Designed for use with freshwater and marine aquariums
    • Herbal extracts help to calm fish and relieve stress
    • 1 fl oz of solution treats 60 U.S. gal of aquarium water
    • Part 1 of the Python three step water treatment system

    Regular Price: USD 3.99

    Sale Price USD 2.99

    Regular Price: USD 3.99

    Sale Price USD 2.99

  • Python Multi-Purpose Bio-Support - 67.6 fl oz
    • Jump-starts aquarium filters with live beneficial bacteria
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 67.6 fl oz of solution treats 4.000 U.S. gal of aquarium water
    • Part 2 of the Python three step water treatment system

    Regular Price: USD 39.99

    Sale Price USD 19.99

    Regular Price: USD 39.99

    Sale Price USD 19.99

  • Python Multi-Purpose Bio-Support - 4 fl oz
    • Jump-starts aquarium filters with live beneficial bacteria
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 4 fl oz of solution treats 240 U.S. gal of aquarium water
    • Part 2 of the Python three step water treatment system

    Regular Price: USD 6.99

    Sale Price USD 3.99

    Regular Price: USD 6.99

    Sale Price USD 3.99

  • Python Multi-Purpose Bio-Support - 16.2 fl oz
    • Jump-starts aquarium filters with live beneficial bacteria
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 16.2 fl oz of solution treats 960 U.S. gal of aquarium water
    • Part 2 of the Python three step water treatment system

    Regular Price: USD 15.99

    Sale Price USD 6.99

    Regular Price: USD 15.99

    Sale Price USD 6.99

  • Python Multi-Purpose Bio-Support - 1 fl oz
    • Jump-starts aquarium filters with live beneficial bacteria
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 1 fl oz of solution treats 60 U.S. gal of aquarium water
    • Part 2 of the Python three step water treatment system

    Regular Price: USD 2.99

    Sale Price USD 1.49

    Regular Price: USD 2.99

    Sale Price USD 1.49

  • Python Multi-Purpose Bio-Clean - 67.6 fl oz
    • Breaks down organic waste in aquarium water
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 67.6 fl oz of solution treats 4.000 U.S. gal of aquarium water
    • Part 3 of the Python three step water treatment system

    Regular Price: USD 49.99

    Sale Price USD 24.99

    Regular Price: USD 49.99

    Sale Price USD 24.99

  • Python Multi-Purpose Bio-Clean - 4 fl oz
    • Breaks down organic waste in aquarium water
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 4 fl oz of solution treats 240 U.S. gal of aquarium water
    • Part 3 of the Python three step water treatment system

    Regular Price: USD 8.99

    Sale Price USD 3.99

    Regular Price: USD 8.99

    Sale Price USD 3.99

  • Python Multi-Purpose Bio-Clean - 16.2 fl oz
    • Breaks down organic waste in aquarium water
    • Designed for use with freshwater and marine aquariums
    • Made safe for use with fish, invertebrates, and plants
    • 16.2 fl oz of solution treats 960 U.S. gal of aquarium water
    • Part 3 of the Python three step water treatment system

    Regular Price: USD 14.99

    Sale Price USD 9.99

    Regular Price: USD 14.99

    Sale Price USD 9.99

  • Kordon NovAqua - 4 fl oz
    • Detoxifies chlorine, chloramine, and heavy metals
    • Eliminates copper ions and other toxic elements
    • Adds and replenishes natural protective skin slime
    • Creates a buffer, helping to acclimate new inhabitants
    • Reduces stress for fish in times of strain or anxiety

    Regular Price: USD 5.99

    Sale Price USD 3.49

    Regular Price: USD 5.99

    Sale Price USD 3.49

  • Microbe-Lift Gel Filter Cartridge Inoculant - 8 fl oz
    • Strongly attaches to any type of filter media
    • Allows biological bacteria to promptly form
    • Restores your ponds healthy bacterial state
    • Helps denitrification to lower nitrate levels
    • Suitable to use in freshwater or saltwater
    USD 9.20
    USD 9.20
  • API Ammo Lock - 4 fl oz
    Works instantly, in both fresh and saltwater, to detoxify ammonia and remove chlorine and chloramines. Locks up ammonia in a non-toxic form until it can be broken down by the tank's natural biological filter.
    USD 5.00
    USD 5.00
  • API Stress Zyme+ - 8 fl oz
    • Keeps aquarium water levels stable and clean!
    • 5 milliliters a week will treat 10 gallons of water
    • Boasts 100 million live bacteria per teaspoonful
    • This will prevent low pH and low oxygen levels
    • It is safe for both freshwater & saltwater tanks
    USD 8.08
    USD 8.08
  • API Stress Zyme+ - 16 fl oz
    • Keeps aquarium water levels stable and clean!
    • 5 milliliters a week will treat 10 gallons of water
    • Boasts 100 million live bacteria per teaspoonful
    • This will prevent low pH and low oxygen levels
    • It is safe for both freshwater & saltwater tanks
    USD 12.30
    USD 12.30
  • API Stress Zyme+ - 64 fl oz
    • Keeps aquarium water levels stable and clean!
    • 5 milliliters a week will treat 10 gallons of water
    • Boasts 100 million live bacteria per teaspoonful
    • This will prevent low pH and low oxygen levels
    • It is safe for both freshwater & saltwater tanks
    USD 44.37
    USD 44.37
  • API Stress Zyme+ - 1 gal
    • Keeps aquarium water levels stable and clean!
    • 5 milliliters a week will treat 10 gallons of water
    • Boasts 100 million live bacteria per teaspoonful
    • This will prevent low pH and low oxygen levels
    • It is safe for both freshwater & saltwater tanks
    USD 49.19
    USD 49.19
  • API Tap Water Conditioner - 4 fl oz
    • Super-strength water conditioner
    • Instantly removes chlorine and detoxifies heavy metals
    • Each gallon of tap water only requires a single drop!
    • Safe for all aquatic life
    • Use when setting up a new aquarium or when adding water
    USD 3.46
    USD 3.46
  • API Tap Water Conditioner - 16 fl oz
    • Super-strength water conditioner
    • Instantly removes chlorine and detoxifies heavy metals
    • Each gallon of tap water only requires a single drop!
    • Safe for all aquatic life
    • Use when setting up a new aquarium or when adding water
    USD 6.64
    USD 6.64
  • API Tap Water Conditioner - 1 gal
    • Super-strength water conditioner
    • Instantly removes chlorine and detoxifies heavy metals
    • Each gallon of tap water only requires a single drop!
    • Safe for all aquatic life
    • Use when setting up a new aquarium or when adding water
    USD 31.46
    USD 31.46
  • Red Sea Reef Colors - A (Iodine/Halogens) - 500 ml
    • Complete range of complementary major, minor, and trace element complexes
    • Contains halogens associated with the pink pigments of the soft tissues of corals
    • Dose according to a measured uptake of Iodine using Red Sea's Iodine Pro test kit
    USD 13.99
    USD 13.99
  • Red Sea Reef Colors - B (Potassium) - 500 ml
    • Complete range of complementary major, minor, and trace element complexes
    • Contains halogens associated with the red pigments of the soft tissues of corals
    • Dose according to a measured uptake of K using Red Sea's Potassium Pro test kit
    USD 13.99
    USD 13.99
  • Red Sea Reef Colors - C (Iron/Trace) - 500 ml
    • Complete range of complementary major, minor, and trace element complexes
    • Contains halogens associated with the green/yellow pigments of the soft tissues of corals
    • Dose according to a measured uptake of Iron using Red Sea's Iron Pro test kit
    USD 13.99
    USD 13.99
  • Red Sea Reef Colors - D (Bioactive Minerals) - 500 ml
    • Complete range of complementary major, minor, and trace element complexes
    • Contains halogens associated with the purple/blue pigments of the soft tissues of corals
    • Make sure to only dose according to a measured requirement of the aquarium
    USD 13.99
    USD 13.99
  • Red Sea Reef Energy A (Concentrated Energy Source) - 500 ml
    • Contains a blend of carbohydrates in a readily accessible format for corals
    • Grows parallel to the energy provided by symbiotic zooanthealle algae
    • For complete supplementation, use in conjunction with Reef Energy B
    USD 18.99
    USD 18.99
  • Red Sea Reef Energy B (Aminio Acids & Vitamins) - 500 ml
    • Contains a blend of amino acids & vitamins allowing corals to grow
    • Grows parallel to the energy provided by symbiotic zooanthealle algae
    • For complete supplementation, use in conjunction with Reef Energy A
    USD 18.99
    USD 18.99
  • Red Sea Reef Foundation Supplement - A (Ca/Sr) - 1 kg
    • Foundation A is a part of the Red Sea's Complete Reef Care system
    • This foundation is a powdered version in the amount of 1 kilogram
    • This A supplement contains blended salts of Calcium and Strontium
    USD 22.99
    USD 22.99
  • Red Sea Reef Foundation Supplement - A (Ca/Sr) - 500 ml
    • Foundation A is a part of the Red Sea's Complete Reef Care system
    • 1 ml of A will raise the Calcium level of 25 gallons of water by 2 ppm
    • Each Foundation has a convenient measuring cup for simple dosing
    USD 14.99
    USD 14.99
  • Red Sea Reef Foundation Supplement - B (Alk) - 500 ml
    • Foundation B is a part of the Red Sea's Complete Reef Care system
    • 1 ml raises the alkalinity of 25 gallons of water by 0.36 meq/l (1dKH)
    • Each Foundation has a convenient measuring cup for simple dosing
    USD 14.99
    USD 14.99
  • Red Sea Reef Foundation Supplement - B (Alk) - 1 kg
    • Foundation B is a part of the Red Sea's Complete Reef Care system
    • This foundation is a powdered version in the amount of 1 kilogram
    • Reef Foundation B powdered supplement is a complex of carbonate
    USD 22.99
    USD 22.99
  • API Stress Zyme+ - 4 fl oz
    • Keeps aquarium water levels stable and clean!
    • 5 milliliters a week will treat 10 gallons of water
    • Boasts 100 million live bacteria per teaspoonful
    • This will prevent low pH and low oxygen levels
    • It is safe for both freshwater & saltwater tanks
    USD 4.30
    USD 4.30
  • API Stress Coat Marine - 16 fl oz
    Fish & tap water conditioner. The only marine water conditioner with the healing power of Aloe Vera. Developed for use with a protein skimmer: will not cause foaming. Removes chlorine, chloramines and ammonia from tap water.
    USD 8.70
    USD 8.70
  • API Stress Coat+ - 1 gal
    • Patented formula contains aloe vera - nature's liquid bandage
    • Forms a synthetic slime coating on the skin of fish
    • Replaces natural slime lost by handling, shipping, stress, etc.
    • Removes ammonia, chlorine, and chloramines instantly
    • Also neutralizes heavy metals
    USD 40.99
    USD 40.99
  • API Ammo Lock - 8 fl oz
    Works instantly, in both fresh and saltwater, to detoxify ammonia and remove chlorine and chloramines. Locks up ammonia in a non-toxic form until it can be broken down by the tank's natural biological filter.
    USD 10.04
    USD 10.04
  • API Ammo Lock - 16 fl oz
    Works instantly, in both fresh and saltwater, to detoxify ammonia and remove chlorine and chloramines. Locks up ammonia in a non-toxic form until it can be broken down by the tank's natural biological filter.
    USD 8.81
    USD 8.81
  • API Betta Complete Water Conditioner - 1.25 fl oz
    Instantly makes tap water safe for Bettas. Contains Aloe Vera to help stimulate their natural protective slime coating, and repair fins and tissue damaged from handling and disease. Detoxifies chlorine, chloramine, ammonia and heavy metals.
    USD 3.27
    USD 3.27
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