My idea well my version of someone elses idea lol.
Materials
500ml wide mouth pyrex bottle
Medical tube
fish tank air pump and proper fittings

Run tube from pump to bottle have the end of this tube
at bottom of bottle.. run another tube from top if the bottle to a T fitting run 2 tubes from the T too your tank one in each side .. fill bottle with water and bingo.. would this work or is it just a fail idea