I always thought I'd make a small drop off tank. Those Dynamax drop off aquariums are the most overpriced tanks with inbuilt sumps if they were a 10'th of the price I'd consider getting one. I had the idea of making a small Nano drop off, but after setting up a 90 liter Marine tank, It's hard to go out and buy another ATO especially for a Nano. I would need glass panes and reef-safe silicone to give it an internal sump. I just cbf drilling or ransacking my garage looking for a diamond tip glass drill bit or paying for one. I like saving money