What are tanins? Is it what you get from peat? I have tetras and wondered if tanins would hurt my other fish, clown loach and cory. If it is peat is it just the stuff you get at the plant nursery? Do I just stick it in the aqua clear filter?
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Yes, but you can always use pond peat - my LFS sells it for about £9 per bag and it's guaranteed safe (not nitrates or sulphur etc.).Davy Reynolds said:Some peats you get from the garden centre contain high levels of nitrate and sulphate. These high levels are not good of the aquarium. You can get lower levels in some bag but which ones are often hard to find.