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:smoking:... another problem F6 would tell you is that fish excrete ammonia mainly as N-waste, little actual urea,.... which quickly turns into ammonium (NH4+) in solution, and too much of that N source is bad news,... that's why it's usually the lesser % total N in ferts,... NH4+ will acidify pH as it's taken up and the roots boot out an H+ during the charge/pH balancing act during uptake.... plus it's metabolized very differently that nitrate,... and NO3-- uptake releases OH-, a base ion.....

You can get a wierd thing going on if ozone, pure O2 and other things get together..

A properly working bio filter you won't see any amonia or nitrite, just nitrate as No3 which I think is fine for veg but not ideal in bloom, pretty sure No2 is ok for bloom.

Anyway, fish water or not, a bio filter is useful for any recirc hydro.
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:smoking: Trail my friend, I love your fuzz-butt crew, hardy happy souls! :pighug: nothing quite like seeing a Doxie navigating through deep snow! :vibe:
 
You can get a wierd thing going on if ozone, pure O2 and other things get together..

A properly working bio filter you won't see any amonia or nitrite, just nitrate as No3 which I think is fine for veg but not ideal in bloom, pretty sure No2 is ok for bloom.

Anyway, fish water or not, a bio filter is useful for any recirc hydro.
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looks like a pricey unit
 
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