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Additives

The best way to keep your fish healthy is to keep your aquarium healthy. With these aquarium additives and regular aquarium maintenance, you can keep your water free of harmful chemicals and keep your fish safe and happy.

54 products
vibrant reef aquarim cleaner
Vibrant Liquid Aquarium Cleaner for Reef Tanks
$24.95
Two Little Fishies PhosBan-L Liquid Instant Phosphate Binder
Two Little Fishies PhosBan-L Liquid Instant Phosphate Binder
$24.99
Ammonia poisoning is the most common killer of aquarium fish. Ammonia is produced by decomposing plants, algae, fish waste and uneaten food. Dangerous ammonia levels often occur in new aquariums or in an established tank when adding new livestock, when a filter stops working due to power or mechanical failure, or if existing beneficial bacterial colonies are lost due to the use of medications or sudden change in water conditions.
Fritz Aquatics Ammonia Remover for Aquarium, 4-Ounce
$12.95
ESV B-Ionic Calcium Buffer System
ESV B-Ionic Calcium Buffer System
$19.99 Sold out
Thrive SHRIMP S500 Specialty Liquid Fertilizer Thrive SHRIMP S 500
Thrive SHRIMP S500 Specialty Liquid Fertilizer Thrive SHRIMP S 500
$14.95 Sold out
ACP™ Bio Elements™ are essential minor components / elements / ions in natural sea water (NSW). ACP™ Bio Elements™ is a special concentrated formulation of important minor elements found in natural sea water (NSW).
Aqua Craft BIO-Elements 16 oz. #6
$19.95
Seachem Prime Water Conditioner is the complete and concentrated conditioner for both fresh and saltwater aquariums. Use during startup and water changes to eliminate and detoxify harmful chemicals in tap water and make your aquarium safe for fish.
Seachem Prime Water Conditioner
$10.75
Two Little Fishies Magnesium Concentrate
Two Little Fishies Magnesium Concentrate for Aquarium, 500ml
$12.95
Aqua Craft Iodide 16 oz. #8
Aqua Craft Iodide 16 oz. #8
$12.95
Fritz Aquatics Complete Water Conditioner, 4-Ounce
Fritz Aquatics Complete Water Conditioner, 4-Ounce
$7.95
CARIB SEA PurpleUp Corraline Algae Growth Accelerator for Aquariums
CARIB SEA PurpleUp Corraline Algae Growth Accelerator for Aquariums
$9.95
Aqua Craft Sr & Mo 16 oz.#9 (Strontium & Molybdate)
Aqua Craft Sr & Mo 16 oz.#9 (Strontium & Molybdate)
$11.95
Aqua Craft SEA TRACE 16 oz. #10
Aqua Craft SEA TRACE 16 oz. #10
$11.95
Aqua Craft Magnesium 16 oz. #3
Aqua Craft Magnesium 16 oz. #3
$14.95
ESV B-Ionic Strontium
ESV B-Ionic Strontium
$13.99
ESV-B-Ionic Magnesium
ESV-B-Ionic Magnesium
$19.95
E.S.V. Potassium Iodide Solution
E.S.V. Potassium Iodide Solution
$11.95
Thrive Specialty Liquid Fertilizer Thrive C4000
Thrive Specialty Liquid Fertilizer Thrive C4000
$79.95
Thrive Specialty Liquid Fertilizer Thrive S4000
Thrive Specialty Liquid Fertilizer Thrive S4000
$78.95 $69.95 Sale
Thrive 4000 Specialty Liquid Fertilizer
Thrive 4000 Specialty Liquid Fertilizer
$79.95
Thrive C 2000 Specialty Liquid Fertilizer
Thrive C 2000 Specialty Liquid Fertilizer
$44.95
Thrive Specialty Liquid Fertilizer Thrive S2000
Thrive Specialty Liquid Fertilizer Thrive S2000
$44.95
ThriveCaps Specialty Fertilizer 60 Thrive Cap Thrive Capsules
ThriveCaps Specialty Fertilizer 60 Thrive Cap Thrive Capsules
$15.95
Thrive C500 Specialty Liquid Fertilizer Thrive C 500
Thrive C500 Specialty Liquid Fertilizer Thrive C 500
$22.95
Thrive Specialty Liquid Fertilizer Thrive 500
Thrive Specialty Liquid Fertilizer Thrive 500
$14.95
Thrive Specialty Liquid Fertilizer Thrive 2000
Thrive Specialty Liquid Fertilizer Thrive 2000
$36.95
Thrive Specialty Liquid Fertilizer Thrive +500 PLUS
Thrive Specialty Liquid Fertilizer Thrive +500 PLUS
$14.95
Thrive +4000 Specialty Liquid Fertilizer
Thrive +4000 Specialty Liquid Fertilizer
$79.95
Boyd Enterprises Marine Vitachem for Aquarium
Boyd Enterprises Marine Vitachem for Aquarium
$12.95
Kent Marine Tech CB Part B
Kent Marine Tech CB Part B
$12.95
Kent Marine Phytoplex Aqua-cultured Phytoplankton
Kent Marine Phytoplex Aqua-cultured Phytoplankton
$14.95
Aqua Craft Sulfate 16 oz. #4
Aqua Craft Sulfate 16 oz. #4
$12.95