Additives

Items 97 to 144 of 326 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.
  • Tetra AquaSafe Plus - 3.38 fl oz
    AquaSafe Plus works instantly to make tap water safe for fish. The patented PLUS BioExctract formula contains natural biopolymers and essential vitamins and minerals for healthy and clear water.

    Regular Price: USD 3.49

    Sale Price USD 2.99

    Regular Price: USD 3.49

    Sale Price USD 2.99

  • Tetra AquaSafe Plus - 8.45 fl oz
    AquaSafe Plus works instantly to make tap water safe for fish. The patented PLUS BioExctract formula contains natural biopolymers and essential vitamins and minerals for healthy and clear water.

    Regular Price: USD 3.99

    Sale Price USD 3.59

    Regular Price: USD 3.99

    Sale Price USD 3.59

  • Kent Marine Purple Tech - 8.7 fl oz
    Kent Marine Purple Tech stimulates the growth of purple coralline and green calcareous macro-algae. It provides specific concentrations of calcium, magnesium, strontium, trace minerals and carbonates required by coralline algae and stony corals.

    Regular Price: USD 6.99

    Sale Price USD 4.99

    Regular Price: USD 6.99

    Sale Price USD 4.99

  • Kent Marine Purple Tech - 17.4 fl oz
    Kent Marine Purple Tech stimulates the growth of purple coralline and green calcareous macro-algae. It provides specific concentrations of calcium, magnesium, strontium, trace minerals and carbonates required by coralline algae and stony corals.

    Regular Price: USD 10.89

    Sale Price USD 8.99

    Regular Price: USD 10.89

    Sale Price USD 8.99

  • Kent Marine Pro Buffer dKH - 8 fl oz
    Kent Marine Pro Buffer dKH is an easy to use liquid formula that raises alkalinity and automatically controls pH in any marine aquarium. It is formulated to adjust pH of saltwater aquariums to between 8.0 and 8.3.

    Regular Price: USD 5.99

    Sale Price USD 4.99

    Regular Price: USD 5.99

    Sale Price USD 4.99

  • Kent Marine Discus Essential - 16 fl oz
    Kent Marine Discus Essential replaces important trace minerals found in lakes, streams, and rivers that are important to fish and plants and removed through chemical filtration. Can be used for all freshwater fish.

    Regular Price: USD 10.99

    Sale Price USD 8.99

    Regular Price: USD 10.99

    Sale Price USD 8.99

  • Kent Marine Pro Buffer dKH - 16 fl oz
    Kent Marine Pro Buffer dKH is an easy to use liquid formula that raises alkalinity and automatically controls pH in any marine aquarium. It is formulated to adjust pH of saltwater aquariums to between 8.0 and 8.3.

    Regular Price: USD 7.99

    Sale Price USD 5.99

    Regular Price: USD 7.99

    Sale Price USD 5.99

  • Kent Marine Pro Buffer dKH - 64 fl oz
    Kent Marine Pro Buffer dKH is an easy to use liquid formula that raises alkalinity and automatically controls pH in any marine aquarium. It is formulated to adjust pH of saltwater aquariums to between 8.0 and 8.3.

    Regular Price: USD 19.99

    Sale Price USD 16.99

    Regular Price: USD 19.99

    Sale Price USD 16.99

  • Two Little Fishies Kalkwasser - 4.4 lb
    • 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

    Regular Price: USD 29.99

    Sale Price USD 25.99

    Regular Price: USD 29.99

    Sale Price USD 25.99

  • Seachem Stability - 50 ml
    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.
    USD 2.74
    USD 2.74
  • Kent Marine Coral Accel - 16 fl oz
    Kent Marine Coral Accel provides complex proteins and amino acids necessary to spur coral tissue growth. Ideal nutrition when fragmenting small polyped stony corals and propagating soft corals, octocorals, and colonial anemones.

    Regular Price: USD 12.99

    Sale Price USD 10.99

    Regular Price: USD 12.99

    Sale Price USD 10.99

  • Kent Marine Coral Accel - 8 fl oz
    Kent Marine Coral Accel provides complex proteins and amino acids necessary to spur coral tissue growth. Ideal nutrition when fragmenting small polyped stony corals and propagating soft corals, octocorals, and colonial anemones.

    Regular Price: USD 7.99

    Sale Price USD 5.99

    Regular Price: USD 7.99

    Sale Price USD 5.99

  • Kent Marine Coral Accel - 64 fl oz
    Kent Marine Coral Accel provides complex proteins and amino acids necessary to spur coral tissue growth. Ideal nutrition when fragmenting small polyped stony corals and propagating soft corals, octocorals, and colonial anemones.

    Regular Price: USD 34.99

    Sale Price USD 31.49

    Regular Price: USD 34.99

    Sale Price USD 31.49

  • Kent Marine Marine C - 8 fl oz
    • Suitable for marine fish and invertebrates
    • Helps their immune system & metabolism
    • Helps tissue repair from coral propagation
    • Fights off bacterial or parasitic infections

    Regular Price: USD 16.99

    Sale Price USD 13.99

    Regular Price: USD 16.99

    Sale Price USD 13.99

    Out of stock

  • API Tap Water Conditioner - 8 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

    Regular Price: USD 4.49

    Sale Price USD 3.99

    Regular Price: USD 4.49

    Sale Price USD 3.99

  • API Accu-Clear - 8 fl oz
    Clarifies hazy aquarium water fast, eliminating clouding brought about by suspended particles. Clumps tiny floating particles together, forming large particles to be removed by the aquarium filter. Eliminates milky haze caused by gravel in new aquariums.

    Regular Price: USD 6.99

    Sale Price USD 4.99

    Regular Price: USD 6.99

    Sale Price USD 4.99

  • Two Little Fishies Kalkwasser - 1.1 lb
    • 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

    Regular Price: USD 15.26

    Sale Price USD 12.99

    Regular Price: USD 15.26

    Sale Price USD 12.99

  • Seachem Acid Buffer - 300 g
    Acid Buffer is a non-phosphate buffer to lower pH and buffer. It is designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Acid Buffer lowers pH and buffers between 5.0 and 8.0.
    USD 6.30
    USD 6.30
  • Seachem Alkaline Buffer - 300 g
    Alkaline Buffer is a non-phosphate buffer designed to raise pH and alkalinity (KH). Designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Raises pH and buffers between 7.2 and 8.5.
    USD 6.30
    USD 6.30
  • Seachem Discus Buffer - 250 g
    Seachem Discus Buffer helps to replicate the ideal Discus environment (low pH & low GH). Discus Buffer will lower pH and keep it lowered. It also softens water by precipitating calcium and magnesium. Adjusts pH to 5.8 - 6.8.
    USD 6.44
    USD 6.44
  • Seachem Discus Buffer - 1 kg
    Seachem Discus Buffer helps to replicate the ideal Discus environment (low pH & low GH). Discus Buffer will lower pH and keep it lowered. It also softens water by precipitating calcium and magnesium. Adjusts pH to 5.8 - 6.8.
    USD 19.28
    USD 19.28
  • Seachem Equilibrium - 4.8 kg
    Equilibrium is specifically designed to establish the ideal mineral content for the planted aquarium. Equilibrium is ideally suited for use with RO (reverse osmosis) or DI (deionized) water or any mineral deficient water.
    USD 61.48
    USD 61.48
  • Seachem Neutral Regulator - 250 g
    Seachem Neutral Regulator adjusts pH to neutral (pH 7.0) from either a low or high pH and maintains it there. It softens water by precipitating calcium and magnesium while removing chlorine, chloramine, and ammonia. Also stimulates slime coat production.
    USD 6.44
    USD 6.44
  • Seachem Neutral Regulator - 1 kg
    Seachem Neutral Regulator adjusts pH to neutral (pH 7.0) from either a low or high pH and maintains it there. It softens water by precipitating calcium and magnesium while removing chlorine, chloramine, and ammonia. Also stimulates slime coat production.
    USD 19.28
    USD 19.28

    Out of stock

  • Seachem Marine Buffer - 250 g
    • Safely raises and maintains the pH levels to 8.3
    • Not just sodium bicarbonate or sodium carbonate!
    • Dissolves readily and does not obscure water clarity
    USD 6.05
    USD 6.05
  • Seachem Marine Buffer - 1 kg
    • Safely raises and maintains the pH levels to 8.3
    • Not just sodium bicarbonate or sodium carbonate!
    • Dissolves readily and does not obscure water clarity
    USD 18.71
    USD 18.71

    Out of stock

  • Seachem Reef Builder - 1 kg
    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.
    USD 18.71
    USD 18.71

    Out of stock

  • Seachem Reef Builder - 4 kg
    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.
    USD 59.18
    USD 59.18
  • Seachem Reef Buffer - 500 g
    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.
    USD 10.29
    USD 10.29
  • Seachem Equilibrium - 300 g
    Equilibrium is specifically designed to establish the ideal mineral content for the planted aquarium. Equilibrium is ideally suited for use with RO (reverse osmosis) or DI (deionized) water or any mineral deficient water.
    USD 6.30
    USD 6.30
  • Seachem Malawi/Victoria Buffer - 300 g
    Malawi / Victoria is a blend of carbonate salts designed to enhance the natural environment of cichlids by increasing hardness, buffer capacity, and pH. Formulated to maintain a pH of 7.8 - 8.4. Use when setting up new aquariums or doing water changes.
    USD 6.05
    USD 6.05
  • Seachem Malawi/Victoria Buffer - 1.2 kg
    Malawi / Victoria is a blend of carbonate salts designed to enhance the natural environment of cichlids by increasing hardness, buffer capacity, and pH. Formulated to maintain a pH of 7.8 - 8.4. Use when setting up new aquariums or doing water changes.
    USD 18.71
    USD 18.71

    Out of stock

  • Seachem Prime - 250 ml
    • Removes unwanted chlorine, chloramine
    • Detoxifies heavy metals, ammonia, and nitrite
    • Stimulates a healthy, natural slime coat
    USD 7.79
    USD 7.79
  • Seachem Prime - 2 L
    • Removes unwanted chlorine, chloramine
    • Detoxifies heavy metals, ammonia, and nitrite
    • Stimulates a healthy, natural slime coat
    USD 46.41
    USD 46.41
  • Seachem Reef Advantage Calcium - 250 g
    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.
    USD 7.27
    USD 7.27
  • Seachem Reef Advantage Calcium - 1 kg
    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.
    USD 21.60
    USD 21.60

    Out of stock

  • Seachem Reef Advantage Calcium - 4 kg
    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.
    USD 78.15
    USD 78.15
  • Seachem Reef Iodide - 250 ml
    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.
    USD 5.93
    USD 5.93
  • Seachem Reef Kalkwasser - 500 g
    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.
    USD 12.62
    USD 12.62
  • Seachem Reef Strontium - 250 ml
    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.
    USD 5.97
    USD 5.97
  • Seachem Reef Builder - 300 g
    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.
    USD 6.05
    USD 6.05
  • Seachem Reef Buffer - 250 g
    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.
    USD 6.05
    USD 6.05
  • Seachem Reef Buffer - 1 kg
    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.
    USD 18.71
    USD 18.71
  • Seachem Reef Advantage Magnesium - 1 kg
    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.
    USD 11.44
    USD 11.44
  • Seachem Reef Carbonate - 500 ml
    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.
    USD 6.13
    USD 6.13
  • Seachem Reef Iodide - 500 ml
    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.
    USD 9.08
    USD 9.08
  • Seachem Reef Plus - 500 ml
    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.
    USD 9.45
    USD 9.45
  • Seachem Reef Strontium - 500 ml
    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.
    USD 9.14
    USD 9.14

    Out of stock

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