Hi!

Has anyone ever thought of or actually build a hang-on-the-back UAS before? I sort of envision the SM algae scrubber, but attached to the outside of the tank, maybe immersed in some large refugium (such as a Finnex) or a custom-built box that it would fit into, and have water flow through it the same way it would a HOB filter but the airstone would propel the water up the scrubber's screen before it leaves the HOB.

Any input & ideas, comments & suggestions welcome.