Going to jump in on this thread...
I'm new to fish-keeping, and I was given a 10 G tank and filter as a gift.... the filter is used, I have no idea what brand it is (nothing on it) but it is a
HOB. Problem is that the water cascade that comes out is too strong... it knocks the poor fish sideways, or all the way to the gravel. What type would you reccomend that won't stress the poor things out? I leave it off a lot, and I realize that that defeats the purpose of having filtration.
Second: it has a carbon insert... is carbon good for filtration in a planted tank? Or does it take out the 'nutrients' that the plants need?