Fish dying one at a time. Stingray sick!!

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A

alc11

Jack Dempsey
MFK Member
Jul 1, 2013
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I have a 610gal freshwater tank with a 125gal sump. We have the tank setup on a 40gal a day drip water change with a filter guys setup to remove chemicals from our water before going in. Our water levels are good AMM .014 PH 7.92 and temp 78 according to out Seneye. Nitrite 0 and Nitrate around 20 currently. About 7 weeks ago we had a fairly large Oscar start to swim bad and die. Few weeks after it a 1 ft 6in Arowana started not swimming or eating and died a few days later. We added 2 baby Motoro Rays and used PraziPro to treat for parasites. Now we have a Rec Ray that has started not swimming much and wouldn't even eat nightcrawlers this morning. What could be happening? I have been considering getting rid of all the fish and just focusing on getting the baby Rays happy and healthy.
 
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does that say you have ammonia readings? Theres your problem right there.
 
the amm reads as a 0ppm on an api test kit. The slide tester we have gives a digital reading, but its still saying its a perfectly fine level.
 
alc11 said:
the amm reads as a 0ppm on an api test kit. The slide tester we have gives a digital reading, but its still saying its a perfectly fine level.
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then pics would be good as well. any visible markings? flashing? anything like that?
 
What do you have for filter media in your sump?
 
Can't really see any markings. The other 2 fish didn't show any either. Just a big change in swimming patten. The first Oscar would not try and fight the current at all and lay on the bottom on its side. The Arowana laid on the bottom also, but stayed upright. We did move the first Oscar to our sump for a few days and tried a salt bath. Seemed to be getting better at one point. The other Oscars we have could be seeming a little weaker while swimming. The powerhead might move them a little more then normal.

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Our Media is a 5gal bucket of Pond Matrix, About equal amount of bio balls, UV filter, Carbon, filter socks, and several dividers

 
Hope you sort it out and I can't offer much advice other than you don't look to have much media in your sump considering the messy fish you keep
Could be you are getting spikes in your wat r perameters?
Oscars are messy and rays produce tons of ammonia
I would double the amount of bio media in your sump
 
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