hang on back

Hi all, Have 2 aquaclear 70's I no longer need. lots of extra sponges, pre filters and, and flow control output devices. will sell for $30 each. I also have a lot of matrix media but that might be expensive to ship.

This listing is for a lot of three total filters. Seachem Tidal 110 series. Extremely clean. Includes extra custom cut foam (black) from local aquarium shop. The black foam has a tighter porosity than the blue, and can be layered in the tray/compartment. I run mostly Ehiem classic style...

Hello, A weird question - what if I submerge a hang on back filter with a pump that is not supposed to be submerged? Will that result in a electric shock whenever the water is touched? I am looking at Fluval C4.