01-21-2009, 06:31 AM
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Are you cetain that you are dealing with fin rot? Some male guppys especially fancy guppys will nip the fins of other fancy tails.Did you quarantine new fish you added after tank cycled?
Is it possible to post picture of affected fish?
Were it me (and it aint) I would do 50 percent water change and put charcoal filters back in and leave them. When you removed them you no doubt also removed the beneficial bacteria that had just developed. Stop dumping meds in the tank and let it be.If fish survive ,,fine ,if not resist the urge to add chemicals. Purchase Small fish like guppys ,or bloodfin tetras, or pristilla tetras five or six ,,thats all. Let these five or six fish reside in the tank for ten to fourteen days with NO more additions. Purchase these fish from somewhere other than where you have been getting fish. Feed these five or six SMALL fish once a day for the fourteen days. Then maybe purchase no more than TWO more small fish maybe, cory's (more can be added later.) leave these fish in the tank for ten to fourteen days and continue to feed once a day SMALL amount. Do test the water after a couple weeks with API freswater master kit. And let us know where you are at. DON"T remove or clean the filters during this time and feed as instructed SMALL amounts and you will be on your way to re-establishing the beneficial bacteria that was destroyed when you removed the filters to dump meds in. Your tank ,if parameters posted were correct had just finished the nitrogen cycle and was in my view,,, too newly matured to remove the filters thus placing your fish in danger of ammonia,and or nitrites.