OK. I'm not entirely new to Mantids, but I've had bad luck. Some died from shedding, some from my mistakes etc... But now im left with a couple mantids. 1 Giant Indian whos about 2 inches, 2 baby flower mantids, and 1 baby african. I have them housed in those little tanks, with the colored plastic lids. I usually throw lizard litter on the bottom ...and a branch or two. I spray it often etc...But i notice the tank gets this white STUFF on the side ffrom the water. I was just wondering, am i better off just putting my nymphs into something a lot simpler since theyre growing and prone to a lot? The white build up on the tank kind of urks me.