I have a 1 year old black moor, with an unusually long and flowing tail. A couple of days ago, there was a filter accident. His fins are extremely frayed, and the other fish started nipping at them. I put him in his own 5 gallon tank, with minimal water flow. I turn the filter on whenever i'm looking at the tank, so as to be sure he doesnt get "sucked up" again. I buried the end of the filter intake with rocks. I added a pinch of aquarium salt, and have been doing Melafix treatments. all he does is sit on the bottom, looking lifeless. A tap on the glass reassures me that he's not, he struggles to move a couple of inches. Every time he tries to swim, fragments of his tail fall of and float in the water. this little guy is my favorite fish. please help me save him!