Wow... Usually the cloudiness is the BB bloom. However there may or may not be something leaching in the tank... BLEACH should never be used on a cartridge IMO as there is no way to actually remove it from the fibres. I don't even use vinegar. I dunk in old fish water, swish it about to remove gunk and put it back in.
There is a chance there are traces of bleach leaking into your tank... Have you tried a new cartridge?
The heater went crazy... Was there any sight, smell, or sound associated with it? Slimy yellow on the surface, burning rubber smell etc?
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.