JBJ 28g 150W HQI Cube :)!

[Ruth]

Did you use live rock from your previous system or is everything in the tank new?
If new it might be just the usual cycle of algeas that we always seem to go through on a new tank.
If you used old live rock it could be that it had a bunch of crud that had settled in the rock and moving it has released the nutrients to feed the algea.
You might want to think about hooking up a phosban reactor for a little while to try and clear up the algea. Or borrow a sea hare from someone for a little while to chow down.