supasi Posted October 14, 2006 Report Share Posted October 14, 2006 woke up this morning and went to feed my little friends and was greeted by a floating zeb danio(damit).i looked a bit harder and saw that there was also a floating SAE and a lemon tetra, but worst of all one of my discus id dont know what happenend. i know the water should have been fine as only did a change the other day, temp fine and then i remembered that last night i had been playing around with my diy co2 setup(well a hotch potch one i was trying using a sodastream bottle an airston) turns out that while fiddling i had been pumping a fair amount of co2 in tank and forgot about it and went to bed. when i tested my ph thismorning it was just below 5, it normally sits about 6.2. im not sure if this is what did it but it seems highly likely to me!!!! the other fish were sulking in corners amoung plants and colour wasnt that great. in a mad rush to get to work i quickly did a 50% water change and disconnected the co2. the remaining fish seem fine now and all i can say to myself is you stupid idiot :oops: :oops: :oops: would i be right to say that this is what killed the poor things? Quote Link to comment Share on other sites More sharing options...
curviceps Posted October 14, 2006 Report Share Posted October 14, 2006 quite likely, since increase in carbon dioxide will reduce pH at a given level of KH (as you have found out). unstable pH can be dangerous to fish. carbon dioxide poisoning could also occur above certain carbon dioxide levels. Quote Link to comment Share on other sites More sharing options...
sharn Posted October 14, 2006 Report Share Posted October 14, 2006 sorry to hear that Si i agree on the co2, it can do a range of things when pumped in in larger amounts. Quote Link to comment Share on other sites More sharing options...
SpidersWeb Posted October 14, 2006 Report Share Posted October 14, 2006 Sorry for your loss pH 5 is very acidic ouchies Sorry to hear, but yeah injecting CO2 (paticularly pressurised systems) is a science in itself, you'll need a needle valve to control the bubble rate properly, and either a strong air pump (to dissipate the CO2) or a solenoid to turn the CO2 off when the lights are off. Also with CO2 you'll want to make sure you have suitable lighting. Quote Link to comment Share on other sites More sharing options...
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