I wouldnt keep blennys that have the same body type together. Also watch over your scooter because they tend to only eat pods
and I dont think your tank has been up and running long enough to have a nice population of them. Ohh one more thing keep a lid on your tank those firefish tend to be jumpers. I have lost 2 from my tank and I am always picking them off the floor at the pet store I work at. Good luck with the fish. I havent heard of those supplements before I tend to stay away from most of them because they are mostly water.
125g~Zoanthid dominated~SPS~LPS~T. crocea~S. haddoni~2xSaddleback Clowns~Hippo, Kole, Achilles Tang~Leopard Wrasse~Flame Angel~Purple Firefish~Gobies~Chromis~3xCleaner Shrimp~2xHarlequin Shrimp~Pistol Shrimp