Back To The Basics

ATM’s Barrier is a lesson in aquarium fundamentals, bringing you this standard sodium thiosulfate formula that neutralizes chlorine and chloramine as well as heavy metals. Barrier also contains aloe vera, which replaces slime coat on fish to reduce stress and aids in attachment of ATM Colony nitrifying bacteria.


118 ml (897 L) | 236 ml (1,798 L) | 473 ml (3,596 L)

ATM Products Knowledge Base


All The Right Stuff

With Barrier there is no harsh industrial reducing agents and that means no problems with test kits and no risks or unwanted side effects.  At ATM we are innovators by nature, but sometimes the “new school” is the “old school”.  A healthy dose of Aloe Vera reinforces fish health in two ways:  By replacing protective slime coat and the natural healing benefits of Vitamin E.

Barrier is also the choice for poorer water conditions where excess heavy metals occur.  Barrier neutralizes these heavy metals, resulting in a safer environment for your fish.


  • Neutralizes Chlorine, Chloramines And Heavy Metals
  • Non-Formaldehyde Formula
  • Replaces Slime Coat Reducing Stress


Shake well. Add 1 capful (5ml) per 10 gal (37.85 L) of water to remove chlorine and chloramine. NOTE: Although toxic chlorine and chloramine are no longer a threat to your tank inhabitants, residual ammonia may be present. If ammonia is present in your tank at any time, discontinue feeding and add ATM ColonyTM for safe, natural ammonia removal. Once ammonia levels are at or near zero, resume feeding.


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