Check the listing for details. 24VDC Thomas SOLAR Pond Aerator, Aeration PUMP 24 Volt DC, 2 CFM Flow!. Condition: New. Listed at 768.85 USD. Thomas Industries, "Continuous Duty" DC/ SOLAR POWERED aeration pump with: Your customizable Choice of Hose & Diffuser Options!!! (select from above)**You will need to provide your own source of 12 Volt DC power from: a battery, solar panel, generator or other appropriate source to run operate this pump….**Pump Specs:24 Volt DC / 4 amps Watts: 84 - 106 1.7 - 2.3CFM or approx. 60 LPM output. (Actual flow will depend on voltage of your DC power source & depth of your pond). Volts x amps = Watts. You'll should supply a minimum of 100 watts of Solar Panels or other 24VDC power source to run this pump in full sun. A Larger solar panel array is better, the pump will only draw the power it needs and with more power available it can start up earlier in the day as the sun is rising, run later into evening time as sun is setting, run on some overcast or partly cloudy days, etc. Hose & Diffuser Information: *Standard Black Aeration Tubing is: durable - yet flexible & easy to work with standard aeration hose. (You will REALLY appreciate flexibility of this hose if you've ever worked with polyethylene or other similar, much stiffer hoses on the market). *DIFFUSER(S): USA made, self weighting: Synergistic RING TYPE DIFFUSER(S) for efficient oxygen transfer & water mixing lift. You simply attach to hose coming from pump output & drop them into the desired location of your pond! * Pump Includes: Inlet air filter "washable" element + a spare air filter element for future use. Thomas Pump COLOR & style may vary from pics, Power & Output specs are the same. A word about sizing: We have many customers using these & similar systems in ponds from around 1/4 surface acre to 1 acre in size and even larger..with very satisfactory results. MAIN RULE OF THUMB IS THIS: "ANY AERATION IS MUCH, MUCH BETTER THAN NONE AT ALL!" -------------------------------------------------------------------------------------