Additives

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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.
  • Microbe-Lift XTremes
    • Single-phase, buffered liquid water conditioner
    • Removes and detoxifies chlorine and ammonia
    • Nitrite copper and heavy metals are detoxified
    • Destroying chloramines & boosts the alkalinity
    • Adds electrolytes & multi-part skin-slime replacer

    Price From: USD 3.83

    Price From: USD 3.83

  • NutraFin Aqua Plus Water Conditioner
    Protects scales, fins, neutralizes chlorine, chloramines, and undesirable metals. With patented stress relief function with the inclusion of pure herbal extracts. A complete tap water conditioner that improves aquatic environments.

    Price From: USD 4.38

    Price From: USD 4.38

  • NutraFin Waste Control Biological Water Additive
    Helps reduce aquarium maintenance by helping to reduce waste in gravel, power filters, decoration and on interior aquarium surfaces. Rapidly reduces organic waste from overfeeding, fish waste and other decaying material such as plant leaves.

    Price From: USD 6.58

    Price From: USD 6.58

  • Kent Marine Liquid Calcium Reactor
    Kent Marine Liquid Calcium Reactor provides the same results as costly calcium reactor systems without the investment. It will raise aquarium concentrations of calcium, magnesium, strontium, trace minerals, and carbonates (alkalinity/buffering capacity).

    Price From: USD 32.99

    Price From: USD 32.99

  • Seachem Reef Plus
    Seachem Reef Plus is a full spectrum reef supplement containing trace elements, vitamins, and amino acids demonstrated to have a positive impact on the growth of corals and other reef creatures. Provides nutrients available from tropical reef waters.

    Price From: USD 9.80

    Price From: USD 9.80

  • Seachem Safe
    • Complete and concentrated dry conditioner
    • Quickly and effectively removes chlorine and chloramine
    • Convert ammonia into a safe, non-toxic form
    • Use at start-up and whenever adding or replacing water
    • Great for both freshwater and saltwater applications

    Price From: USD 10.47

    Price From: USD 10.47

  • Seachem Replenish
    Replenish is a proprietary blend of salts designed to replenish physiologically relevant minerals that are removed by reverse osmosis or deionizing filtration.

    Price From: USD 4.20

    Price From: USD 4.20

  • Two Little Fishies BioPronto Marine
    • Contains cultured, naturally occuring microbes
    • Rapidly starts biological filtration process in marine aquariums
    • Helps initiate the nitrification cycle in new aquariums
    • Enhances nitrification/denitrification in heavily stocked aquariums
    • Made in the U.S.A.

    Price From: USD 18.54

    Price From: USD 18.54

  • API pH Down
    Lowers pH and makes aquariums more acidic. Fast-acting, colourless and easy-to-use.

    Price From: USD 4.19

    Price From: USD 4.19

  • API Proper pH 7.5
    Proper pH 7.5 neutralizes chlorine, detoxifies heavy metals, and adds electrolytes to the aquarium. Contains Aloe Vera, a proven natural stress reducer and healing agent. Proper pH 7.5 will lower or raise the pH until 7.5 is reached. pH will not rebound.

    Price From: USD 8.29

    Price From: USD 8.29

  • API Proper pH 8.2
    Proper pH 8.2 neutralizes chlorine, detoxifies heavy metals, and adds electrolytes to the aquarium. Contains Aloe Vera, a proven natural stress reducer and healing agent. Proper pH 8.2 will lower or raise the pH until 8.2 is reached. pH will not rebound.

    Price From: USD 8.29

    Price From: USD 8.29

  • Carib Sea PurpleUp
    Carib Sea PurpleUp is a pink and purple coralline algae accelerator. Since PurpleUp is not a fertilizer, it does not promote the growth of nuisance algae. PurpleUp delivers calcium, strontium, magnesium, and carbonate. Also replenishes iodine.

    Price From: USD 9.88

    Price From: USD 9.88

  • Carib Sea CoralUp
    • Complete reef calcium engineered for skeletal coral growth
    • Patented dual method approach contains real aragonite!
    • Naturally occurring carbonate supports pH of reef systems
    • With an additional supply of iodine, strontium, and magnesium
    • Each 5ml capful of contains over 170,000 ppm of calcium

    Price From: USD 10.99

    Price From: USD 10.99

  • Seachem Reef Advantage Calciums
    Seachem Reef Advantage Calcium is a non-caustic (pH 8.3 - 8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth.

    Price From: USD 7.55

    Price From: USD 7.55

  • ATM Colony Marine Professional Grade Nitrifying Bacteria
    • Instantly cycles aquariums with real nitrifying bacteria
    • Neutralizes ammonia and nitrite spikes naturally
    • Prevents and eliminates "New Tank Syndrome"
    • Made in the U.S.A.

    Price From: USD 4.93

    Price From: USD 4.93

  • ATM Paradigm All Natural Vitamin C Water Conditioner
    • Vitamin C neutralizes chlorine and chloramine instantly
    • Boosts fishes' immune systems
    • Contains aloe vera and Vitamin E for natural healing
    • Replaces slime coat to reduce stress
    • Non-formaldehyde formula

    Price From: USD 4.38

    Price From: USD 4.38

  • SR Aquaristik Calcium Chloride (CaCl 2)
    • Laboratory tested and pharmaceutical-grade
    • Ideal for raising Calcium levels in reef aquariums
    • Dissolves easily and completely in purified water
    • Ammonia and phosphate free
    • Made in the U.S.A.

    Price From: USD 5.49

    Price From: USD 5.49

  • SR Aquaristik Alkalinity KH Booster (Sodium Bicarbonate)
    • Laboratory tested and pharmaceutical-grade
    • Ideal for raising alkalinity in reef aquariums
    • Dissolves easily and completely in purified water
    • Ammonia and phosphate free
    • Made in the U.S.A.

    Price From: USD 5.49

    Price From: USD 5.49

    Out of stock

  • SR Aquaristik Alkalinity KH PH Booster (Sodium Carbonate/Soda Ash)
    • Laboratory tested and pharmaceutical-grade
    • Ideal for raising alkalinity and pH in reef aquariums
    • Dissolves easily and completely in purified water
    • Ammonia and phosphate free
    • Made in the U.S.A.

    Price From: USD 5.49

    Price From: USD 5.49

  • SR Aquaristik Magnesium Supplement (Magnesium Chloride Hexahydrate)
    • Laboratory tested and pharmaceutical-grade
    • Ideal for raising magnesium in reef aquariums
    • Dissolves easily and completely in purified water
    • Ammonia and phosphate free
    • Made in the U.S.A.

    Price From: USD 6.49

    Price From: USD 6.49

  • SR Aquaristik Magnesium Supplement (Magnesium Sulfate)
    • Laboratory tested and pharmaceutical-grade
    • Ideal for raising magnesium in reef aquariums
    • Dissolves easily and completely in purified water
    • Ammonia and phosphate free
    • Made in the U.S.A.

    Price From: USD 9.99

    Price From: USD 9.99

  • SR Aquaristik Kalkwasser (Calcium Hydroxide)
    • Laboratory tested and pharmaceutical-grade
    • An ideal calcium and pH booster for reef aquariums
    • Dissolves easily and completely in purified water
    • Ammonia and phosphate free
    • Made in the U.S.A.

    Price From: USD 5.49

    Price From: USD 5.49

  • Two Little Fishies AcroPower Amino Acid Formula for SPS Corals
    • Unique blend of amino acids used by corals
    • Promotes accelerated development of skeletal structures
    • Enhances the natural coloration of stony corals
    • Ideal for Acropora, Montipora, Stylophora, and others
    • Made in the U.S.A.

    Price From: USD 12.54

    Price From: USD 12.54

  • Seachem Pristine
    • Uses non-chemical bio-augmentation to improve water quality
    • Provides bacteria that break down excess food, water, and detritus
    • Reduces excess nutrients (e.g. ammonia, nitrates, and nitrites)
    • Increases water clarity and promotes overall system health
    • Great for use in both freshwater and saltwater aquariums

    Price From: USD 4.21

    Price From: USD 4.21

  • Reef Foundation ABC+ Liquid Supplement - 250 ml - 3 pk
    • Calcium (Ca) and Strontium (Sr) complex in bottle A
    • Has carbonate (Alk) and buffer complex in bottle B
    • Has Magnesium (Mg) element complex in bottle C
    • This will promote positive coral health and growth
    • Will achieve balanced formation of coral skeletons
    USD 22.99
    USD 22.99
  • Microbe-Lift XTreme - 8 fl oz
    • Single-phase, buffered liquid water conditioner
    • Removes and detoxifies chlorine and ammonia
    • Nitrite copper and heavy metals are detoxified
    • Destroying chloramines & boosts the alkalinity
    • Adds electrolytes & multi-part skin-slime replacer

    Regular Price: USD 5.99

    Sale Price USD 4.93

    Regular Price: USD 5.99

    Sale Price USD 4.93

  • Microbe-Lift XTreme - 4 fl oz
    • Single-phase, buffered liquid water conditioner
    • Removes and detoxifies chlorine and ammonia
    • Nitrite copper and heavy metals are detoxified
    • Destroying chloramines & boosts the alkalinity
    • Adds electrolytes & multi-part skin-slime replacer

    Regular Price: USD 4.49

    Sale Price USD 3.83

    Regular Price: USD 4.49

    Sale Price USD 3.83

  • Microbe-Lift XTreme - 16 fl oz
    • Single-phase, buffered liquid water conditioner
    • Removes and detoxifies chlorine and ammonia
    • Nitrite copper and heavy metals are detoxified
    • Destroying chloramines & boosts the alkalinity
    • Adds electrolytes & multi-part skin-slime replacer

    Regular Price: USD 7.99

    Sale Price USD 6.58

    Regular Price: USD 7.99

    Sale Price USD 6.58

    Out of stock

  • Microbe-Lift Special Blend - 8.5 fl oz
    • Helps to break down decaying organic matter and cycle elements
    • Reduces maintenance & lowers ammonia and nitrates from water
    • Breaks down protein foam and residue on gravel, plants and rocks
    • Odors will be eliminated and water clarification will be activated
    • Plant growth is naturally stimulated and presents better absorption

    Regular Price: USD 6.99

    Sale Price USD 6.03

    Regular Price: USD 6.99

    Sale Price USD 6.03

  • Microbe-Lift Special Blend - 4 fl oz
    • Helps to break down decaying organic matter and cycle elements
    • Reduces maintenance & lowers ammonia and nitrates from water
    • Breaks down protein foam and residue on gravel, plants and rocks
    • Odors will be eliminated and water clarification will be activated
    • Plant growth is naturally stimulated and presents better absorption

    Regular Price: USD 4.49

    Sale Price USD 3.83

    Regular Price: USD 4.49

    Sale Price USD 3.83

  • ATM Colony Freshwater Professional Grade Nitrifying Bacteria
    • Instantly cycles aquariums with real nitrifying bacteria
    • Neutralizes ammonia and nitrite spikes naturally
    • Prevents and eliminates "New Tank Syndrome"
    • Made in the U.S.A.

    Price From: USD 4.38

    Price From: USD 4.38

  • Two Little Fishies Kalkwasser
    • Pure source of Calcium Hydroxide
    • Replenishes calcium and maintains alkalinity
    • Benefits corals, clams, and calcareous algae
    • Helps maintain pH, precipitates phosphates, and enhances protein skimming

    Price From: USD 15.26

    Price From: USD 15.26

  • Seachem Reef Advantage Magnesiums
    Reef Advantage Magnesium is a concentrated (80,000ppm) optimized blend of magnesium chloride and sulfate salts, designed to restore depleted levels of magnesium with minimal impact to the ionic ratios found in natural seawater.

    Price From: USD 8.65

    Price From: USD 8.65

  • Seachem Reef Buffers
    Seachem Reef Buffer will raise carbonate alkalinity; however, it is intended primarily for use as a buffer in a reef system where the maintenance of a pH of 8.3 is difficult. Designed to meet the needs and requirements on the closed reef environment.

    Price From: USD 6.28

    Price From: USD 6.28

  • Seachem Reef Builder
    Reef builder raises carbonate alkalinity without immediately impacting on ph. Carbonates and calcium are essential to all coral growth. If either becomes deficient, coral growth will cease, followed by a rapid decline in coral health.

    Price From: USD 6.28

    Price From: USD 6.28

  • Seachem Reef Carbonate
    Reef Carbonate is a concentrated (4,000 meq/l) optimized blend of carbonate and bicarbonate salts designed to restore and maintain alkalinity in the reef aquarium. Calcium and carbonates are essential to all coral growth.

    Price From: USD 3.99

    Price From: USD 3.99

  • Seachem Reef Fusion 1
    Reef Fusion 1 provides not only 100,000 mg/L of ionic calcium, but also includes biologically appropriate levels of magnesium, strontium, boron, iron, manganese, and molybdenum.

    Price From: USD 7.50

    Price From: USD 7.50

  • Seachem Reef Fusion 2
    Reef Fusion 2 contains a mixture of carbonates and bicarbonates at an alkalinity of 4400 meq/L. It is designed to restore and maintain alkalinity in the reef aquarium and provide calcareous species with the essential carbonate needed for growth.

    Price From: USD 7.50

    Price From: USD 7.50

  • Seachem Reef Iodides
    Seachem Reef Iodide is a concentrated (8,000 mg/L) stabilized potassium iodide source for reef aquaria that will restore and maintain iodide levels to those found in seawater. Provide a safe source of iodide that will not convert to toxic free iodine.

    Price From: USD 6.16

    Price From: USD 6.16

  • Seachem Reef Kalkwassers
    Seachem Reef Kalkwasser is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater (kalkwasser) solutions that will maintain calcium concentrations at natural seawater levels.

    Price From: USD 13.11

    Price From: USD 13.11

  • Seachem Reef Strontiums
    Reef Strontium is intended to restore and maintain strontium to levels found in natural seawater without affecting pH. Aids the growth of corals, coralline algae and other organisms that lay down a calcereous skeleton or shell.

    Price From: USD 6.19

    Price From: USD 6.19

  • Seachem Reef Trace
    Reef Trace supplies a broad range of trace elements demonstrated to be necessary for proper reef health and growth. It helps maintain an environment ideal for the growth and reproduction of marine life.

    Price From: USD 9.80

    Price From: USD 9.80

  • Seachem Stability
    Stability will rapidly and safely establish biofiltration in freshwater and marine systems. Contains a synergistic blend of aerobic, anaerobic, and facultative bacteria which facilitate the breakdown of waste organics, ammonia, nitrite and nitrate.

    Price From: USD 2.84

    Price From: USD 2.84

  • Tropic Marin Bio-Calcium
    • Adds all 70 trace elements including strontium, molybdenum and iodine
    • Only natural substances are formed when dissolved- Add directly to your tank, no need to premix or drip.
    • Supplies calcium carbonate for corals and CO2 for the zooxanthellae.
    • Will not influence pH of aquarium if used as directed.
    • Measured amount of calcium in a truly ionically balanced formula

    Price From: USD 9.65

    Price From: USD 9.65

  • Tropic Marin Bio-Magnesium
    • Contains a combination of magnesium and minerals to promote essential biochemical processes in the aquarium.
    • Magnesium for accelerated skeleton growth of corals and calcareous coralline algae.
    • Maintains the natural ionic concentration and the pH value of the reef tank water!
    • No unnatural by-products. No phosphates or nitrates.
    • Measured amount of Magnesium in a truly ionically balanced formula.

    Price From: USD 13.53

    Price From: USD 13.53

  • Two Little Fishies C-Balance
    • Two-part calcium and alkalinity maintenance system
    • Adjusts calcium, magnesium, and strontium ions to seawater ratios
    • Keeps your calcium and alkalinity in perfect harmony
    • Ensures optimal conditions for growing stony corals and coralline algae

    Price From: USD 22.29

    Price From: USD 22.29

  • Microbe-Lift Special Blend - 16 fl oz
    • Helps to break down decaying organic matter and cycle elements
    • Reduces maintenance & lowers ammonia and nitrates from water
    • Breaks down protein foam and residue on gravel, plants and rocks
    • Odors will be eliminated and water clarification will be activated
    • Plant growth is naturally stimulated and presents better absorption

    Regular Price: USD 9.49

    Sale Price USD 8.23

    Regular Price: USD 9.49

    Sale Price USD 8.23

    Out of stock

  • Microbe-Lift Special Blend - 1 gal
    • Helps to break down decaying organic matter and cycle elements
    • Reduces maintenance & lowers ammonia and nitrates from water
    • Breaks down protein foam and residue on gravel, plants and rocks
    • Odors will be eliminated and water clarification will be activated
    • Plant growth is naturally stimulated and presents better absorption

    Regular Price: USD 42.99

    Sale Price USD 40.68

    Regular Price: USD 42.99

    Sale Price USD 40.68

    Out of stock

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