Hm... still couldn't find the brush.. found one but it's base was curved, so not suitable...
Anyway, I bought something else, those plastic brush that we use to wash clothes with... Damn cheap, $1 for 2... U guys think this will work??
What I'm afraid is that there the bristles are too close together and might result in a lack of water flow... but if that's so I can simply snip them off...
How is it feasible? Don't wanna chop the fans of my MJ impeller only to find that this won't work...