1-888-9-WEBPETS
(1-888-993-2738)
Certified Seal
Dogs Cats Fish Birds Reptiles Small Pets Pond

Additives & Supplements

Aquarium Supplies

Fish Additives & Supplements

We carry a wide variety of additives produced by the most respected companies serving the aquarium hobby, such as Kent Marine, E.S.V., Seachem and Two Little Fishies. 2-part Calcium and Alkalinity Supplements are popular additives among reef keepers since calcium and alkalinity tend to deplete quickly in a reef aquarium.

Grid List

Set Ascending Direction

Items 1-10 of 100

per page
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  1. E.S.V. B-Ionic 2-Part Calcium Buffer 64oz (32oz each bottle)

    E.S.V. B-Ionic 2-Part Calcium Buffer 64oz (32oz each bottle)

    Be First to Review

    B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing powder...
    ON SALE

    Was: $22.49

    $20.29

  2. E.S.V. Calcium Hydroxide 3.5 Lbs.

    E.S.V. Calcium Hydroxide 3.5 Lbs.

    Be First to Review

    Keep your aquarium water at its best by using the E.S.V. Calcium Hydroxide regularly. Calcium Hydroxide from Pet Store , also known as Kalkwasser Powder, effectively maintains the calcium level and alkalinity of the aquarium wate...
    ONLY
    $22.49
  3. E.S.V. B-Ionic Magnesium 1 Gal

    E.S.V. B-Ionic Magnesium 1 Gal

    Be First to Review

    Promote the health of your aquatic fish and plants by ensuring that they get the best quality of aquatic water in your tank. The E.S.V. B-Ionic Magnesium from Pet Store can help you achieve the right water pH and calcium level...
    ONLY
    $22.99
  4. Korallin PO4 Minus

    Korallin PO4 Minus 500mL

    Are you tired of constantly replacing the water in your aquarium because it seems to be getting dirty too often? Do you want to be assured with a way to keep the liquid clean and healthy without spending money on electricity and g...
    ON SALE
    $29.98
  5. Korallin Amino-Life 500 mL

    Korallin Amino-Life 500 mL

    Taking care of coral reefs is very rewarding. There's nothing like looking at an aquarium filled with beautifully and vibrantly colored corals swaying and undulating with the flow of the water. Of course, getting corals reefs t...
    ONLY
    $29.49
  6. Korallin S-Plus 500 mL

    Korallin S-Plus 500 mL

    When purchasing a product that can work for all types of reef life , the best choice that you can possibly make lies with the Korallin S-Plus from Pet Store . This 500-ml bottle offers you and your friends several benefits that ...
    ONLY
    $29.50
  7. Korallin Magnesium Plus 500mL

    Korallin Magnesium Plus 500mL

    Be First to Review

    Magnesium is present in natural sea water in a fairly high concentration (1350 - 1500 mg/L) and an essential element of chlorophyll which is necessary for photosynthesis. Without photosynthesis, plants, algae and coral would not b...
    ONLY
    $27.98
  8. Kent Marine Garlic Extreme 4oz

    Kent Marine Garlic Extreme 4oz

    Be First to Review

    Have you ever experienced any difficulties with feeding new fish? Do you have finicky eaters that seem to repel everything that you present to them? If so, then you may want to give the Kent Marine Garlic Extreme from Pet Store ...
    ONLY
    $25.99
  9. Kent Marine Super Iodide 64 oz.

    Kent Marine Super Iodide 64 oz.

    Be First to Review

    Maintain a fresher and healthier aquatic environment by treating your water with the Kent Marine Super Iodide from Pet Store . This acts as a supplement that will allow you to clean your tank without using much energy and elect...
    ONLY
    $28.99
  10. Kent Marine Strontium & Molybdenum 64 oz.

    Kent Marine Strontium & Molybdenum 64 oz.

    Be First to Review

    Are you looking for a wonderful product to help algae grow in corals ? The Kent Marine Strontium & Molybdenum from Pet Store is a great product to help you increase the growth of algae in corals. It has additional magnesium not...
    ONLY
    $29.99

Grid List

Set Ascending Direction

Items 1-10 of 100

per page
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5