So three days ago, I purchased three pearl gouramis for my 40 gal. planted aquarium that I've had running for about two months. This morning, I found one lying on its side at the bottom of the tank, dead. Right now, I have a second one acting up, hovering around the surface swimming weakly (I have no idea if the first one was acting like this, it died overnight and was seemingly fine yesterday). There's no unusual growths or discolouration. They're currently being housed with six Sterba's corydoras.
I did a 25% water change with RO water (we've got very hard, high-alkaline tap water) before I went and bought the new fish (the afternoon of), and added them to the tank after first floating the bags and then drip-acclimating for about three hours. My parameters as of now are a pH of 7.0, nitrate 10 ppm, nitrite 0 ppm, GH 180 ppm, and I'm not sure of ammonia because my test strips ran out earlier this week, but there was a very recent water change. I use a Sicce Whale 200 canister for filtration.
Help?
I did a 25% water change with RO water (we've got very hard, high-alkaline tap water) before I went and bought the new fish (the afternoon of), and added them to the tank after first floating the bags and then drip-acclimating for about three hours. My parameters as of now are a pH of 7.0, nitrate 10 ppm, nitrite 0 ppm, GH 180 ppm, and I'm not sure of ammonia because my test strips ran out earlier this week, but there was a very recent water change. I use a Sicce Whale 200 canister for filtration.
Help?
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