Manage temps in aerocloners by cycling the pump on and off with a timer. Running a coupla airstones keeps the enviro in the cloner plenty wet.
Sometimes, when it's warm, I'll only be running the pump for 15min per hour. Stick a cheapo cooking thermometer through the lid and you'll always know what the temps are.
This is my 22 site bucket cloner, change the water every 3 days and yer good to go. Tap water works better than RO.
I cut the inserts out of a sheet of insulating foam, melt a hole through the center and cut a slit from the edge to the hole.
If you stick with the bubble cloner, temps are still key.