I'm sure you should be able to, or perhaps a plumbing, hydraulic, garden centre or a place like valverite, the one in my pic came with my Two Little Fishies phosban reactor.
If not then just run a small pump, a resun king 1 is perfect and very cheap, about R60.
yipSo i can run it on a small pump only, similar to the top-up pump. If yes then this is really easy.
100%So i can run it on a small pump only, similar to the top-up pump. If yes then this is really easy.
I like to have enough flow going through so that just the top 1cm of media appears to be 'bubbling'.