Assuming you adhere to a strict wc schedule, that is appropriate water amount and time intervals, you nitrates shouldn't really hit 40ppm. I can't speak for everyone, but I never test my nitrates. Reason being because a wc is happening whether it reads 10 or 40 ppm. I want my fish in the cleanest water that I can provide. If I didn't work 70+ hrs a week I would probably do small daily wc or bi daily
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