Experts will be here soon to help, I'm sure. In the meantime, sure sounds like you may be right. Hot water contains less DO, and all these factors put together might be the problem. If you've had some cloudy, calm days lately this isn't helpful, either. Well water is usually low in oxygen, by the way. Could be better to turn it off, or at least add oxygen to it.

If you have some kind of marine motor maybe you could run it to help oxygenate & aerate. And in your shoes I'd cut back on feeding, at least for now.

Last edited by anthropic; 06/06/20 10:41 PM.

7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160