I'd like to have a drip wall for the viv I'm working on. What I'm envisioning is water dripping from about 3 or 4 feet from the floor of the viv and then drip from rock/roots/tree trunk (all made with polystyrene/good stuff) down into her swimming pool below. I don't want a big flow, just to have it look like water is seeping through the rocks. I saw an multi outlet manifold that can be used to distribute the water source on the wall. Would a waterfall pump be ok to do this or would a canister filter be better/easier?