slow - zero coral growth

[saltyrockbox]

I guess there are a lot of little things I can work on. I have a little red mushroom that finally split I thought it was going to die but also have some big furry mushroom that have never ever grown, lots of colt frags that grew for a bit then never grew again...I got a hammer that grew a lot for 3 weeks then stopped.
DO you think the slime alage can inhibit growth?
DO you think I need to add any supplements? a lot of people dont and have good results with regular water changes as the only "additive" I use IO salt