Hi Thank you for replying i have lot's of bog wood in the tank and i don't overfeed i have a smaller tank which has endelers in and the only 2 BN that i have left they seem to be ok in that tank but as soon as i put them in my 5 foot tank they die the water is the same the only thing differant is i have no bog wood at all in the small tank, the PH 6Clean water, dont overfeed, wood to gnaw on and not too much meaty food or it will bloat them.