well, i was useing my useless ten gallon to store extra nets, and such. well, one thermometer Cracked. I take the tank and hose it down. I half filled it with water from the convict tank, and put in a heater and filter, to see if the tank was doomed. Well, luckily i discovered a few convict breeding pits, one of them with a fresh, guarded batch of wriglers, vibrating, but not free swimming. i figured they would make good knife food, so i took the runt convict, my scapgoat, and tossed it in the ten gallon. he has been in there for about 5 hours. Are the signs of a poisoned tank quick, or does it show slowly?