jardini arowana problem, help!

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well my jardini died at 5:41 am
my 250g tank had been established 2 years before at my store, the jardini had been introduced about 6 months prior to today. the water is 80 degrees F, Ph 6.5ish, ammonia at .5 ppm, 0 nitrites, 15ish ppm of nitrates. i had never had any problems with the tank. His tank mates were a 15in red tailed catfish and a small African knife fish. the fish are fed with shrimp that have no additves, i never had a problem with those shrimp.

Yesterday at about 3:00pm i got to the store and saw the aro with his fins in the sand and mouth pointing up i though he was dead and when i tried to net him out he got back to normal, freaking out i decided to do a large water change thinking it might be the water so probably at about 8:00pm he was rolling and couldn't swim right, the current produced by the sump pump was knocking him around so i decided to switch him to a smaller 55g tank that had been used but the filter died so i put a new one in and changed half the water. while in that tank he got back to normal and stopped rolling at about 2:00 am he started rolling again and didn't regain control anymore and at 5:41am he finally died.

so what could have killed him?
 
You had ammonia in your tank, that means its not cycled. Then you moved your already damaged jar into another completely uncycled tank, changed half the water, and added a brand new filter, in other words, you started another cycle with a half dead jar in there. The rest is self explanitory. I dont know what exactly killed your jar, but, no offence, everything you did basically contributed to it.
 
Alex8947;4436915; said:
it was very little ammonia does that small amount really mean your tank is uncycled?
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Any small trace of ammonia, as long as it is detectable means your tank is not cycled. You should read up on the nitrogen cycle and proper way to maintain your filters before another incident happens. A cycled tank will only show readings of nitrates.
 
hmm well all my fish are fine no signs of discomfort could the arowana have lost control of his gas bladder. he lost control and regained control of his swimming about 6 times in the length of the day
 
and i do maintain my filter i do a 30%-50% water change every Friday and clean out all the sponges with hot water from a high pressure hose
 
i dont know what went wrong woth the fish but i do agree that your tank was not cylced
but that is niether here or there im sad to hear about the loss ofyour jardini
i have also lost one this year
probably due to the sam problem but now i have my tank in check and a brand new jardini
had him for 3 month
 
Alex8947;4436961; said:
and i do maintain my filter i do a 30%-50% water change every Friday and clean out all the sponges with hot water from a high pressure hose
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It sounds like people are already jumping on you pretty good but that may be yet another problem...don't clean the filter or sponges and if you must, use tank water, not fresh water from a hose.
 
Alex8947;4436958; said:
hmm well all my fish are fine no signs of discomfort could the arowana have lost control of his gas bladder. he lost control and regained control of his swimming about 6 times in the length of the day
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They don't right now, but they will eventually... You have AMMONIA registering in your tests and you're still in denial? Theres a reason we need to establish a nitrogen cycle and do water changes you know...

Alex8947;4436961; said:
and i do maintain my filter i do a 30%-50% water change every Friday and clean out all the sponges with hot water from a high pressure hose
Click to expand...
And theres exactly where your problem is...Like i said, go search it up in the filtration and setup forums. Read up on how you're actually supposed to cycle a tank and how to actually clean your filters...
 
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