But from what Butterfly had said, the coolie loaches don't have a huge bioload on the tank compared to other fish. My coolie is about 2-3" now. They can get to be about 4".They get up to 3" long...How big is your coolie loach? They get to about 3" too if I'm not mistaken...I think you'd be close to your limit.
I have a male endler livebearer in the tank right now, would that be fine if I got a femlae molly?Balloon mollies are huuuuge eaters, and huuuge waster producers (just a word of warning). Mine is a fantastic character, though. Not a nasty bone in her body, and really nosy. Always browsing around for food. She's a female. Other word of advice: avoid putting her with male livebearers. A lot of them don't survive pregnancy.