I have two HOB's on a 50 gallon and am using replacement sponges for sponge filters that cling to wall of the tank via suction cup as pre-filters/protectors. So far, so good!
And it's a fish tank...
Two other tanks have HOB's as well, although only one currently has a pre-filter sponge.
The shrimp tanks have air powered sponge filters, one single, one dual, that suction to the side of the tank.