A fully installed water feature is similarly priced to a hot tub. A well-designed water feature includes: Mechanical and biological filtration, pump and plumbing, 45 mil EPDM liner and underlayment, a berm, underwater lighting, rock work, an automatic fill valve, and a waterfall. Your water garden requires NO CHEMICALS, NO TEST KITS, FAR LESS MAINTENANCE, AND WILL ACTUALLY INCREASE YOUR PROPERTY VALUE!