Fast Auto Siphon
This fast auto siphon has a range from 40 to 50 seconds per gallon and is designed for an 11-12″ deep media bed. If you have a 100 gallon media bed full of gravel it will hold around 40 gallons of water. This siphon will fill and trigger 40 gallons in about 30 minutes and drain in 6-8 minutes. Includes a 4 1/2″ media guard, bottom cap with bulkhead fitting, top cap, and 3/4″ upstand.