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Sounds like you are for sure nitrate deficient. Increasing nitrates will help produce more bacteria to help consume phosphates. The white stuff likes nitrates and that is what is consuming it.Thank u will do, one last question, my phosphates get high without gfo, i mean really high, last time i check there where 0.2 i know that is a lot, should i take the gfo out either way??? I just added it cause that exact same reason
Once nitrates go up, youll see phosphates go down.
No just keep the wc to 15 to 20%.Also how much should i change on every water change. I do 20% every 2 weeks, so just bump it to 40% every 4 weeks?