Decided to do a large water change today as my water was looking a bit brown to tannins. Did approximately a 50% water change and I did not match the temp well, about 1/2 way through refilling all my honduran red points and a few swordtails were laying on their side on the bottom flailing around. It also could have been due to not enough prime in there tank either. Dumped some more prime in, threw a bag of carbon in the filter just in case something happened and turned the lights off. I got lucky, came back two hours later and all were swimming well again. It was not something I want to endure again I am going back to 3-4x a week small water changes.
