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What does water conditioner do?

The main purpose of water conditioners is to break down chlorine and chloramine and make water safe for fish to inhabit. Almost all dechlorinators contain sodium thiosulfate, which reacts to chlorine and chloramine to form harmless byproducts. Sodium thiosulfate looks like rock salt or white powder, and it is often dissolved in water to create liquid dechlorinators. Some water conditioners contain pH buffers, aloe vera to help heal the fish’s slime coats, or extra additives.

For more information, read the full article on dechlorinators.