Phytotronics 00-0002 Brass Siphon Mixer The Brass Siphon Mixer is a best-seller! We've been using brass siphon mixers for over 20 years. No more measuring and mixing needed. Easy, inexpensive and makes liquid fertilizing easy! The Brass Siphon Mixer attaches to ordinary outdoor spigots and garden hoses. One gallon of concentrate is dispensed in 3 to 5 minutes depending on the flow rate.