The bigger loach is about 7" or so. He doesn't stay still very long for me to try to measure. Got a good chance to see the size when he jumped out as I was transferring him to get acclimatized. The smaller loach is about 4.5". Going to grow out a couple more in my smaller 37g tank soon too. Love those guys. They're so much fun. One day I'll have a nice size shoal of loaches for my future 150+ tank.
You must be talking about my 37g tank. Those are german blue rams. They're so much fun to watch. They "battle" harmlessly, mostly just square off. They don't even nip each other's fins. They're dwarf ram cichlids.