Hey dagwood is your pump a low heat transfer external pump? I bought a 180 gal. reef ready used and the sump and pumpcame with the tank. The problem was that the pump was not made for aquarium use and transfered way to much heat not to mention it sounded like a 747. I also used fans on the sump...
I just set up a new 60 gallon tank. I have put in live rock and am waiting for the tank to cycle. The tank has been going for over a week now and it has started getting a brown dusty coating all over the substrate and rock. I used 100% RO water with oceanic salt. I am wondering if this is normal...
