Evolution Aqua 4" Bottom Drain with Air Diffuser Condition:Brand New at the start of each

at the start of each pond season

When used properly

brightness's and transitions for up to 3 independent zones of up to 30 watts per zone

Pond Size Initial Treatment Maintenance Treatment Up to 2500 gallons 1 Tbsp every 3 days (3 times)

Evolution Aqua 4" Bottom Drain with Air Diffuser Condition:Brand New at the start of eachThe EVO 4" Aerated Bottom Drain is made of heavy duty Schedule 80 PVC. It features both a 4" horizontal pipe fitting and a 1" side mounted aeration pipe fitting to make aeration simpler. The center stand pipe can be adjusted, threading to the underside of the aeration plate and gluing to the bottom of the drain base. Includes stainless steel screws, liner ring and aeration disc with plate. We recommend between 30 and 100 liters of air per minute with