unfortunately, something horrible just happened. one of my senegals rushed past him and he panicked, darting snout first into the substrate. he was stunned there for a while and then i started to get worried. upon getting him out(his snout was half in fine sand) he started to sink head first, as though dead, and then i obviously panicked, and took him to the surface of the water. he started to show some signs of life but suddenly went beserk and started swimming in mad circles. and then he just started to sink head first again. not showing anysigns of life except a few feeble spasms...i took him to my 15 gal and stroked his belly for about 15 mins, thinking that he overate, but when he showed no signs of life i let him go and tried to see if he could recover on his own. he started sinking headfirst again, and is now in a verticle position. only after typing all this i came across the possibility that he may have inhaled sand, and died from this?! or WHAT ELSE ON EARTH COULD HAVE HAPPENED TO MY POOR GAR?!?!!?!!?