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How effective are protein skimmers from the viewpoints of regular people not trying to sell me one?
Also, my filter is a fluval 404 and I have read somewhere that it was a nitrite trap. Is this true because I have a 75 gallon tank with only two fish that are small and feed them every other day in order to get my nitrites down. I have tried a 15% water change but the levels stay the same. I wish I could do more water changes but I find the tidius and expensive to do, as I am 14 years old and can not afford 25$ in salt every week trying to maintain my tank.