FreedingFrenzy Posted September 30, 2011 Report Share Posted September 30, 2011 Hi guys, I cleaned my tank today - approx 60% water change and did all the usual things and I looked again after about 4 hours and around 80% of my fish have died, including my 6yo shark . I was just wondering what could have caused this? I did what I usually do when I clean my tank, it has been set up for about 4 months now with no deaths, all my old fish from my older tank, my shark, my danios, my loaches and catfish have died, but my two gouramis have survived... Quite distressing. Help? Quote Link to comment Share on other sites More sharing options...
Squirt Posted September 30, 2011 Report Share Posted September 30, 2011 Did you use a chlorine remover? And what are your water parameters ie ammonia, nitrites and nitrates? This info will help Good luck! Quote Link to comment Share on other sites More sharing options...
ryanjury Posted September 30, 2011 Report Share Posted September 30, 2011 What method did you use to do your water change? Did you just dump a heap of water in there, there is a possibility that you shocked your fish with a 60% water change? Quote Link to comment Share on other sites More sharing options...
FreedingFrenzy Posted September 30, 2011 Author Report Share Posted September 30, 2011 I did use chlorine remover, I don't have any test kits so I can't check the parameters... Definitely something I will be purchasing when I sort this crap out. I did just dump it in... But I have always done that in the past and tried my best to ensure it's warm water and not hot or cold... Quote Link to comment Share on other sites More sharing options...
Squirt Posted September 30, 2011 Report Share Posted September 30, 2011 Hi Keep the water at a steady temperature, at this time of day but turn your lights off and don't feed for a day or so. Your water is already dechlorinated so there's not much else. Just don't stress them out even more. Hope it all works out. Matt Quote Link to comment Share on other sites More sharing options...
Deno Posted September 30, 2011 Report Share Posted September 30, 2011 Same thing happened to me a few weeks ago. I did water changes on 3 tanks. nothing different to usual. About an hour later I'm watching my fish die. Lost an entire colony of Demasoni, A tank full of young and juvenile tangs, all my daffodils which were starting to breed nicely and their babies. The big africans lay on the bottom for a while but then came right. Put that down to a big tank = large volume of water and lots of filtration. I wonder if water services or whatever had just dosed or overdosed with chlorine and it was bad timing Quote Link to comment Share on other sites More sharing options...
Joshlikesfish Posted September 30, 2011 Report Share Posted September 30, 2011 Ammonia in the fresh water supply? It happens Quote Link to comment Share on other sites More sharing options...
FreedingFrenzy Posted September 30, 2011 Author Report Share Posted September 30, 2011 All but my two gouramis died, and the female has a visible fuzziness on her - but nowhere near to the level of a fungus. If it is the water system... That is damn annoying. Quote Link to comment Share on other sites More sharing options...
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