The FH looks like a male to me. The midas/RD is indistinguishable unless you know where it came from. The ck looks good. And the birchir is nice too. The water however....uh.....hmmm....It looks like skim milk, sorry.....You need to crank up the water changes with the bio-load you have in that tank. Not being mean, just letting you know the real deal. I could care less if the tank is too small, you need to keep up with the ammonia and nitrates....IMPO. They do look great and healthy but you could do them so much more justice with clear water...Good luck and welcome to MFK, and sorry for sounding like a jerk