How do I know if my water pumps are doing there job? I was considering getting two Maxijets 1000's (I got that from a thread here on LR by jhnrb)!!! And where do I place them?\r\n\r\nAnother ? as far as the diatoms I had on my glass, I wiped it off with a clean towel(it was so unsightly)!!! Was that a good idea?