My tank cycled pretty quickly too (I used bio spira). I think you could add some chromis in there. I just went through the diatoms thing also...kinka annoying and cool at the same time. They should start dying off soon and then youll start seeing other colors appearing on your rocks...etc. I have a 75 gal
, and do a 20 gal
water change every week. I scrubbed the tank walls with an algae brush, dropped in 6 red leg hermits, 6 austria snails, two mexican turbos and a diamond goby. All is good now. The goby will keep your sand clean and is really cool/rowdy fish...not aggressive towards others. I got all the snails and the goby for about $20. Love watching the hermits and goby...