What's the dumbest thing you've done?

[Murminator]

Originally Posted by Delphinus

I don't run a beckett skimmer without a collection cup anymore (because once it's full it stops letting the skimmer produce foam). And if no collection cup I run the skimmer in the sump, so if it overflows it overflows into the tank. Things you learn the hard way!

I assume you mean the collection cup lid?

I left a frag on the center brace on my tank for a couple days while rearanging.....didn't turn out to well