Cascade Mini-Mountain Spring Triple Bubbler Fountain 4'x4' fountain base holds 70+ gallons of water, circulated by a 2100 gallon-per-hour pump. Also includes two Cascade rock bubblers (approximately 36" and 24" tall) and one Mini-Mountain Spring multi-tiered bubbler (approximately 15" tall). All connections are made by easy-to-assemble PVC connectors Very realistic looking concrete bubblers are hollow, so they're easy to move onto the fountain base without large equipment. Completed project normally only takes around three to four hours Free Shipping. Call LiquidArt with any questions, at (800) 974-9586.