September 30, 201115 yr comment_456208 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? Report
September 30, 201115 yr comment_456212 Did you use a chlorine remover? And what are your water parameters ie ammonia, nitrites and nitrates? This info will help Good luck! Report
September 30, 201115 yr comment_456213 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? Report
September 30, 201115 yr Author comment_456215 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... Report
September 30, 201115 yr comment_456217 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 Report
September 30, 201115 yr comment_456234 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 Report
September 30, 201115 yr Author comment_456254 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. Report
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