for my Moray tank, i just use an oversized piece of plexiglass and 4 or 5 of those C-clips used to lock screened snake-lids onto aquariums and few 2x6's on each end to weigh it downI thought it was going to be tank water on the floor thread...but still not what I'd want to find either - sorry to hear. Sounds like you'll want to address the lid situation. Perhaps as easy as putting something to weigh down, or adding some sort of "locking" mechanism.