i would not worry about a cuke nuking your tank. It happens very infrequently, as you can see by the responses above, ... that being said, I have about 12 in my 210 gal home tank with no issues ever. HOWEVER, I have had it happen, dont get me wrong. BUT, that was a small 30 gal tank with poor water movement and filtration, I mean, cmon, I had a Visi-Jet protein skimmer on the thing! I think that filtration technology has come very far and as long as you have a decent husbandry regime, your tank will certsinly be fine.