I have a 46 gallon tank, about a year ago, the tank went down due to a severe phosphate problem. I drained about 1/4 of the water. I have tried to start it back up with tap water....Upon testing water the PHOSPHATES are still there., are there any QUICK fix products? How about the one below? I hope I would not have to drain the whole tank....I need input on how to resolve this., thanks much!
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