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#13
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![]() There is no purpose in doing a 100% water change or even a 50 for that matter, if your tank has been running fine with np then just do a normal water change. Your substarte and rock will already be saturated with phospates and silica(think thats correct LOL) and doing a 100% water change will not change thos elvlv they will have to precipitate out over time.
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