how far up does a ooth has to be to have the nymphs drop down to the bottom safely as i got all my ooths hanging like around 11 or 12 inches from the bottom of the tank and want to make sure they dont fall to their deaths from that height. Should i add like mesh or something to prevent them from falling or use another container to catch them as they hatch when they do hatch as i got a while yet on them to hatch but just asking!