Nice E. crab, I have them myself and consider them a must have. Unbelievable how hard they attach themselves onto to live rock once on there, (if they for some reason need to be removed)...strong little buggers!!!
I for one am VERY impressed with how things are coming along with your tank, great job . You could always supplement their food (maybe add a few kool snails or a crab?) but better to wait some and let things settle. Please remember to research everything you think (no matter what) and take it slow. You already have an amazing tank and in time will have one that will definitely blow Mike tank right out of the water !!!
I test for everything even though I just have a Fowler tank. In the future I plan on setting up a reef tank. So trying to get everything figured out now lol. And I have to take it slow my wife reminds me all the time about my first tank disaster I had last year. But learned from my mistakes and has been smooth sailing for a year now.