Last thursday I left for work,forgetting to latch the door to the back of my tanks..Well that morning my 4 year old son went to feed my fish,He dumped the whole can(a big can).the next day I didn't feed them and I didn't pay much attention to them.Well saturday afternoon i went to feed them and the can was empty.Then my wife tells me oh,nicholas dumped the whole can of food in your tank.now this happened thurs. morning.Well when i looked closer my 2 long tentacles blue hippo,black and 1 true clowns,manderine goby and my scooter,were all dead..I wanted to kick a hole in my tank ...I changed 15 gal. sat. and 10 sunday and ten more monday..Is this what i'm supossed to do till the water gets back to normal?