My phosphates are at 0.04 alkalinity 7.4 Valium 487 nitrates still over 75.0Chaetogro is good. I would just follow the recommendations on the bottle.
You may need to dose phosphate or maybe feed reef roids as I hear that is high in phosphates if they are very low. What test kit are you using for phosphate?
I am not aware of any issues with fish and nitrates.
I’ve not had a chance to run a diluted test yet



