i haven't kept my BN plecos without a lid, but i know i used to have a 8" common pleco a few years ago that jumped out, and by the time i found him, he was ded X(. right now i have a 6" or so common pleco, but im looking to sell/give (possibley to a store who accepts them) because i already have 4 longfin albino BN plecos.