12-16-2012, 12:26 PM
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Originally Posted by dorabaker
hmm, this is interesting. I find my fish get very stressed and have sometimes succumbed to mild finrot as a result of doing water changes with cold water, so now I always boil the kettle and top up the bucket with some hot water to make the temperature match. The reason I don't just use the hot tap is that for some reason, the water that comes out of my hot tap is INCREDIBLY ALKALINE. which is the last thing I want in a soft-water, acidic setup. at least the cold water is neutral, and I would think it would stay that way when boiled.
I will still become slightly more alkaline from boiling. The issue with boiling is you evaporate off some of the H20, but not any of the mineral in the water. The hardness and buffering therefor increases and is what determines the pH. The TDS and many other factors also increase due to everything in the water become more concentrated.
Have you checked you hot tap mixed or used room temp water? My tap comes out at a pH of 8.5 and I keep community tanks. It drops to 7.8 after sitting for at least 24 hours, then I just do water changes using room temp water. Its never ever cause any issues for me, my rainbows always spawn best the day or two after a water change.