Im with pufferlover,
My dog face could make it through an overstocked 29 gal with no filtration runing at 88 degrees with no food for a week and a PH below 7 with an SG of 1.40. Relax this never happened he has lived his entire life in a 75 gal bowfront by himself, but this guy has been through two ich outbreaks, attacks by a porc puffer, trapped air, all sorts (not for awhile as I remedied the problems some time ago). I am working on a very small cape with an "S" on it for this litle guy. If I can only figure out how to tie it on.