I have 150 gallon tank I set up a year ago for soft corals and a mandarin goby. 2 weeks ago I added 4 seahorses and a fire goby. They don’t do much, so I would like to add more fish but would love suggestions first. I’m new to seahorses, is 4 enough? They seem super social with each other. I don’t want to over crowd the tank though. Plus the fat mandarin goby is my favorite fish so I want to make sure he is still getting all the little food around the tank. He’s got huge over this past year. What are your thoughts on adding to this tank, it’s my first saltwater aquarium and I’m still learning.