Pro-Series Medium Pond KitsPro Series Medium Pond Kits All medium pond kits include our medium AquaFalls filter and PS1FB skimmer for increased filtering capacity over the small pond kits above. All Pro Series "EM" kits include: 45 mil Firestone liner Liner underlayment PS1FB skimmer Medium AquaFalls filter waterfall base EasyPro TH pump with two year warranty Beneficial bacteria 2" flexible PVC pipe Check valve assembly New LED light kit for 2011 three mini LED lights with 45