Finnex 24g at 7 weeks

Everything seems to be going great, I'm even getting some coraline algae growing on the back wall at 7 weeks and the mushrooms, button polyps and pulsing xenias seem to be growing like weeds. Even my hammrr coral is splitting and growing after two weeks. I've seen all sorts of weird worms and snails in the tank that I didn't buy My clown also seems to be hosted by my xenias and open brain, is that weird??? I'll post of a picture of the clown playing in the xenias as well.

Problems: I noticed bubble algae on a rock that I bought with some muchrooms on it. I thought I had cleaned it off, but now it's growing elsewhere. I've also noticed some aiptasias. So I rodered an emerald crab and a peppermint shrimp. I hope that cleans them both up. We shall see. Any other advice??