I came up with another hairbrained idea!! I'm thinking of digging out an area next to the pond so that I can put a kiddie pool in the hole & flip the pond liner over the top, I dont think they're that deep . I'm wanting to just fill it with pea gravel & plants.Would I nee:regular_ an additional pump?? My pond is (i think) 2500 gal with a 4200 gal pump going thru a bio & out the waterfall.Also on the other end of the pond is a cheap submergible pump going thru a uv :::