well my tank has been running great now, sump is all but perfect (evaporation is crazy fast) lights make the tank look great and i have a great dawn and dusk setting, fish look good, and the goby is cleaning the sand fairly well and guess what diatoms are all but gone..... so now my question is can i turn my sump off and empty it out and clean it out really well...there is a bunch of brown stuff on my pump and my heater and the floor of it and the sponge looks really dirty.....so is that ok or no?