What's Included: Fish-Friendly Rubber Liner Protective Underliner DIY Mechanical Skimmer Box DIY Biological Waterfall Box Blue Thumb High-Efficiency Pump Check Valve Assembly 1.5" PVC Flex Pipe Bacti-Twist Filter Media 1.5" Check Valve Installation Instruction Manual Installation Kit Pond Maintenance Kit PB1212 - Small DIY Pond Kit Designed with professional installers in mind but the weekend warrior at heart. A complete 1200-gallon pond kit, ready for installation. The DIY 90 Skimmer will provide ample mechanical filtration while the 1200 Waterfall will handle the biological filtration. This pond kit will provide a nice waterfall sound and a beautiful habitat for your choice of fish. PB1335 - Large DIY Pond Kit For DIYers looking to tackle a larger project, and for professional installers looking for a more affordable option in building smaller ponds. Max Pond Size 11’ x 16’ x 2’ Complete kit ready for installation Designed with professional installers in mind but the weekend at heart. This 2000 gallon pond kit will come complete in a single box ready for installation. The DIY 180 Skimmer will provide ample mechanical filtration while the 2000 Waterfall will handle the biological filtration. This pond kit will provide a nice waterfall sound and a beautiful habitat for your choice of fish. Rock and gravel are not included.