Submersible powerheads and heaters ???

[IluvHockey]

I have bought an Aquaclear 802 power head and a visitherm heater. These twoproducts are suppose to be hermetically sealed and are totally insulated from water damage and electric shock. But are they??? I see some pictures from the gallery that some people fully submerge thier PH and heaters. However I see do not immerse lines on these power heads and heaters that say not to submerge them pass these points. What do most of you guys do. I don't want to fry myself before I start, especially playing with saltwater.

[newreefy]

the immerse line actually means "make sure the power head or heater is in the water atleast up to this line" they want the item under water for the reason of overheating.

[IluvHockey]

On the power heads the stickers read do not immerse beyond the marked water line. On the visitherm heater there s a minium water mark but they also show with a red arrow not to immerse pass the start of the rubber top. So I don't think this is so. What do you do? Do most people follow these intructions or do people even read the fine print? This stuff is new for me.

[EmilyB]

It is for CSA approval in Canada. You will find the same powerheads relabelled in the US.