When cleaning out Mr. Crab's cage, don't dump the excess gunk in the bathtub. Bathtub WILL clog, and I WILL get to unclog it.
As a side note to the note to self, Johnny is still doing well, but we had a sad farewell to Rex after only two weeks. (Johnny and Rex are the hermit crabs Michael got for his birthday.) May Johhny have a long and enjoyable life in his little cage, if only for the fact that I can't bear to see Michael cry at the death of another crab.