heres an idea i came up with
get a large sprite bottle cut a ring out
get a stocking leg and cut it about half way down then put a rock into the stocking
put the ring into the stocking so that the stocking dosen't close up any where then cut a square out of a ice cream container lid then with this square make a square ring and put this at the top of the stocking and stick it too the side of the tank add some java moss to the the inclosuer and you have a wcmm baby holder!
it may not work for you but it seems to work for me