I know they grow big. We still have a 125 and a 180 both sitting empty and waiting.
I just wanted something for now while they all are growing out over the next year or so. That's all that will be in the 90 is what's there now.
I would suggest Zebra or Yoyo Loaches for tanks that are too small for a Clown loach, yet too big for a school of Kuhlis. When you get a bigger tank of course.
Already in the process of moving them over to the 125 along with a pictus and rafael both. I'm going to adopt an albino oscar from friends, it out grew their tank. So I'm putting it in the 90 gal.