No... We're talking about diffusing the water flow not limiting it here. Instread of it coming out of one pipe, it's coming out of a thousand little holes (very course sponge). Bffles slow down the forcce of the return water.
Nic;682351; said:
if it is not alot of resistence no it wont hurt really try to more divert the flow though more tubing to add the the head height that will slow it down