Tanks been cycled for months all of a sudden the ammonia shoots up like a rocket, like the test is so green it looks black. My stingrays dying so I'm really pissed off. Only thing I can think of is when Hurricane Sandy hit my power went out for only like 12 hours so I put the filter cartridges in a bucket of tank water in an effort to save the bacteria. Besides removing a dead stingray from my tank in a few hours how do I fix this mess. I've done so many water changes I'm about to just do like a 95% water change.