Reducing return flow in IM Fusion
Hey everyone! I am a very new member here, but I have been lurking around the forum for a long while! Right now I am in the process of setting up an IM Fusion 10 as a planted tank. This tank was previously set up as a reef tank and the return pump has a rate of 120 GPH. I am planning on keeping a betta and a school of tetras of some sort. However I fear the flow will be too strong. Is there anyway of reducing flow? Ive seen some people but a sponge over the outtake. Would that harm the motor the pump long term?