Just a quick note of caution when using household products, (clothes, sponges,scrapers) even if they list as not having any anti-bacterial, anti mildew etc, there is always the chance that a batch could come into contact with these agents in the factory. I had finally achieved the perfect fish show tank about a year and a half ago and back then I was using a household brand of sponge that I had been using for over a year with no probs to clean it. The next day after cleaning the tank with a new sponge from that same company all my fish were dead. After that I learned to only buy my cleaning tools from the lfs.
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