central americn

Hi. I have these two black belts with me for about 3 months now. Was wandering what the sex of these two guys are. They have been digging the substrate a lot, so was wondering if they are a breeding pair. Any help would be much appreciated

I'm thinking of starting another 75 gallon tank, I actually wanna get a larger one but due to limited space now since I already got a 75 recently, I think another 4 foot tank is the way to go. I want to stock aggressive cichlids in this one. I really love jags but I know 75 isn't enough for...