What Materials Are Commonly Used To Build Ponds? / education / By Brad Underlayment Used underneath of linerProtects the liner from any damage due to rocks and roots in ground 45 mil EPDM Liner Fish and animal safeKeeps water inside of featureFlexible to mold to different water feature designsDurableUsed with underlayment Pond Skimmer Mechanical filter for pondHas removable basket that catches leavesHas a filter padPump is located in bottom of skimmerHandle flow rates up to 10,000 gallons per hour Pump Pumps water from the reservoir to the top of your waterfall3 year WarrantyDifferent sizes avilable pumping from 3,000 GPH up to 8,000 GPH+Energy efficientReliable Check Valve Connects the waterfall pump to the hose leading to the top of the waterfallHas a coller you can unscrew and remove the pump if neededSaves the water in the plumbing when pump shuts offMay not be necessary in some pondless waterfalls and fountainscapes Flexible PVC Pipe Plumbing helps transport water from reservoir to top of waterfallFlexible to make twists and turnsVery durableNormally 2″ in diameter but can be larger Biofalls Filter Water gets pumped to the bottom of this filterThe water rises up through filtration and keeps pond water clearIt needs to be filled with some sort of filter media such as bioballs in order to work properlyNeeds to be cleaned just once per yearOver cleaning can kill beneficial bacteria growing in filter and cause the filter to loose effectiveness. Filter Media BioBalls 19 inches of textured surface area for beneficial bacteria to grow per ballPlaced in counts of 100 in netted bags inside biofalls filter. Beneficial Bacteria Comes with a scooper One scoop treats 1,300 gallonsWork well with filter mediaHelps keep a clean, clear, healthy pond