I was changing my water today a 70% water change. I heard a voice like something cracked. I refiiled my tank again, and i plugged everything back, then suddenly i saw my gouramis laying down in the tank and all fish dancing and jumping iin the tank. I looked and i saw my heater bloom up and there was some electricity in the tank, i directly unplug the heater and remmoved it. One of my gouramis was close o the heater it got electrocuted and made like a banana and her mouth was opened. After 3 min she was normal again. Will survive again or it will die. Now no heater in my tank i added an old one but not working that good. I am going to get a new one tomorrow. How long can they survive the temperature was 28 degrees celcius it dropped to 24 now. I hope they live for tomorrow to get them a new one.