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Whats killing my fish?


Brennos

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Yeah, everything was fine until i added new guppies a few died, then everythting seemed to be ok, now all the harlequins are floating around upside down, and the "waking up" and ebing normal for 10 mins, then back to lying on the bottom of the tank upside down. Is this swim bladder disease?

I think it has something to do with the new filter, maybe a massive ammonia spike stressed them out, and now they are dying? There are no signs of anything amiss with the fish, other than what i have explained. I am watching one harlequin at the moment, it is upside down on the bottom of the tank still breathing, possible gasping? he is about 3 cm.s from my airstone.

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Did you use any of the new media that came with the filter? If so, did you rinse it well? I have seen some instances where the ceramic dust from poorly rinsed new media was suspended in the water and this acted like shards of glass in the gills causing irreperable damage and death to the fish.

Also, when you filled up the new canister, did you use tap water? If so, that may have killed off some of the bacteria and caused an ammonia spike that stressed the fish, etc. etc.

Just some ideas really....

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Well, I have now got, 1 Gourami, 3 Guppies, 2 platys, and defiantly 1 bristlenose, the otehr I can not see, he is in there somewhere, but he is hiding good. I just put a small amount of food in, and non of them seem to be very enthusiastic about it. The 2 platys are hiding under rocks and drift wood, the 3 guppys are staying as still as possible at the top of the water, and the gourami is hanging around the middle of the tank, occasionally going up for a gulp of air. non are eating the food in the tank. I was thinking about getting a UV Purifier tomorrow, as they are $106 at animates, which doesn't seem that bad. That may help if its a bacterial infection i guess. I'm about to do a water test, so ill see how that goes, ill update this post soon.

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UPDATE: My Bristle noses have perked up a little, and are moving around the tank now, instead of hiding under things. My Gourami is moving around a lot more too, He is still hanging around the bottom of the tank, but goes up for air, and speeds down to the bottom as fast as he can, the 2 platys are still hiding behind things, but look OK, but my 2 guppy's appear to have started to get fin rot, but only on the tail, and the 2 fins by the gills, the dorsal and the anal fins are unaffected at this stage, The tail fin, is missing about .5 of a mm, and has white tips??? I have been dosing with rocksalt, and melafix since thursday last week, how can they get fin rot while i am dosing with melafix and rock salt?

And according to my water tests, all seems normal.

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