Originally Posted by Rutrag
I know you said you are not using RODI
due to a funding issue. That leads me to believe you are using tap water. If that's the case, have you checked the nitrates from the tap. You may actually be adding to the issue with the water changes if so.
I was partially thinking the same thing. In the OP, they show a 25% drop in nitrates with a 33% water change, so there is likely some in the tap water. But, with the nitrates as high as they have, and
showing a considerable reduction with pwc
's, it's more
tank issue than water issue. It just means they'll never be able to get to 0, but with a FOWLR
, 0 isn't necessary..... they just need to get the rapid growth under control.