sorry for your lost but i kept my ally snapper in a 125 gal tank filled to the top with water since it is also a fish tank .... had it like that for years...the snapper never had a problem...i doubt your snapper drown...small ally snappers are weak so it might had been something else...
especially when you had no current...the snapper could easily gone up for air...
especially when you had no current...the snapper could easily gone up for air...