So no spot feeding at night? I dont have zoomax but i do have kentmarine phyto plex and coral accel. I also feed the tank flake food and mysis shrimp. the day the diatoms started disapearing was last saturday. I did a water change with grocery store r/o water and viola gonzo. Also only no more than ten hours of light and feeding only once a day. I also got rid of the filter stuff except a bag of chemipure. i also modified my tank. got rid of the pump and put two maxijet 900's and a hydor flo deflector and half inc h locline 125 spouts. just a couple of spots of diatoms, but dissapearing dramattically. Also in the back of the tank I have green spots developing possibly good algae?