I have two of those small powerheads, one of them is a penguin sponge filter and I have an almost identical interal pump like it. I lost the little thing that plugs the hole on the top of the discharge. One tank I rapped a rubberband around airtube cause I am running DIY carbon on it, but I just want to plug up the other one to get more circulation in my bigger tank.
So, what could I use to plug that up to replace the cap?
So, what could I use to plug that up to replace the cap?
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