Imo you'll be alright, I've done similar between all the broken heaters. Never seemed anywhere near as bothered by it vs hot waterWell praying I didn’t kill my aimara. I was swapping out the filter cartridges in my auto drip and need to remove the drip emitter because it got clogged. Figured I would let run wide open for the day allowing for a big water change.
Huge mistake. Apparently the water was so cold it dropped the temp in the tank from 76 to 66 over a couple hours. I have since shut it off and letting the heaters the temp slowly. It’s back up to 70 and should get up to 76 over the 4-5 hours.
He looks fine but who knows. What a stupid mistake.
Can't say I expected him to eat in the tank. But I didn't expect him to rub the glass thought he'd be lazy of anything