hi guys, the test result does not seems to be impress after my second day 20% WC. it still at red level > 50%. What should be my next cost of actions to reduce the NO3 (Feeding and stocking is under control now)? Please advise me the skimmer model and brand as I might want to reduce this fellow when I move to sump tank. thanks.
Can I replace carbon with another other media in my canister?
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