i ran 1 compressor style pump for over 20 tanks in the garage - the trick is to plumb the garage with the 19mm garden sprinkler system black pvc tubing - just run droppers off of it to your tanks - the tubing acts as a reservior so air pressure is never an issue
i know its not fish related but im looking for a running bike motor if someone has one in the depths of their garage - im building a bobber so looking for a power plant - not too fussed what it is - pm me please