Clean Up Crew

Hey guys, I am new to this so bare with me. I have recently set up a 180l marine tank (Juwel vision 180) with a protein skimmer, internal Juwel filter, and external Fluval filter. This is my second attempt first one went badly out of control with green hair algae. So my first question is everything is cycled and was cycled for 3 months before I added 2 x common clown fish.

I have since added 4 x hermit crabs, 5 x turbo snails, and 1 x Emerald crab. I really don't want to suffer another horrible bloom like I had before so my biggest question is What should I add to my clean up crew to help prevent it. and what should I have in total to tidy everything up. My old Tuxedo urchin used to do a good job should I re-add one to the mix?

Any help is appreciated Thanks