I have a 5 x 2 x 2 feet tank serviced by 2 canisters and I wanted to add some more filtration... but I don't have enough space underneath for a sump... so I've been thinking about an over-tank one...
Here's the plan:

Here's the plan:
- This would be made of glass and would be sitting on top of the tank on a sturdy wood frame that would sit on that tank itself - the weight supposedly equally distributed on the 3 sides.
- I would be putting shoots of Philodendron-type plants in the Aquaclay - they don't need much light and would quickly send roots and contribute to the bio-filtration. And Aquaclay is great for plants.
- The filter floss would be redundant really as the water would come from the canisters but well...
