Paintball CO2 tanks are, as far as I can tell, about the most compact way to have a pressurised system. But They're going to need filling reasonably often. So here's a thought ...
If you've got room in a garage for a larger cylinder but not under your aquarium, how about having both and filling the paintball cylinders from a bigger bottle?
(I'm expecting this idea to be blown out of the water, but I thought I'd float it out there amongst the experts.)
If you've got room in a garage for a larger cylinder but not under your aquarium, how about having both and filling the paintball cylinders from a bigger bottle?
(I'm expecting this idea to be blown out of the water, but I thought I'd float it out there amongst the experts.)