What if I connected an aquarium heater grounded metal embedded in a non-grounded outlet?

Is there a way to avoid fatal crashes? I have a 300 W metal submersible aquarium heater that has a 3 pin plug and have to use a 3 – adapter more than 2 feet to plug in the thermostat to keep the water at 100 degrees F. I am concerned that making ungrounded. A GFI / breaker ground fault safer? Should I avoid putting my hand in the water?

Replace two prong receptacle outlet with a wall outlet cable. To comply with codes electric and would be a safe installation. For you and the fish. Electrical Do not take advice from people inexperienced and unqualified.

Malawi and Tanganyika Aquarium Fish Tank 200 gal