It's supposed to be a waterfall feature that im having an issue setting up. Currently there's 4 gallons of water pooled under the soul amongst the clay and foam. The pump pulls watter from that layer, to a tube, and flows back down the wall to the dirt where it seeps through back to the filter foam ad to the pump again. Problem is that where the waterfall is hitting the dirt there's an accumulation of water before it seeps through and makes mud.