I’m often asked how one controls the pump that is sending water in an indexing valve, the answer is a repeat cycle timer. This is the perfect way to control a pump running a timed flood and drain aquaponics system and is really perfect for running a sequenced system. I run my sequenced system so that each grow bed gets water for about 9 minutes out of the hour. On a six outlet indexing valve this works out to once an hour for each bed with the pump turning off for a minute between each bed. So the timer is set for 9 minutes of on time and on minute of off time. Of course these timers are adjustable so all sorts of timing is possible.
C.A.P. Adjustable Recycle Timer
Sorry only one left and I can’t order more at this point. Contact me if you wish to order the One. $85
The ART-DNe recylcing timer by Custom Automated Products controls any application requiring a device to be turned on and off at precise intervals. The ART-DNe has a user adjustable on time of 1 second to 40 minutes and an off time of 1 minute to 8 hours. A day/night/both switch allows you to select the time period that the ART-DNe will operate. The ART-DNe timers have a wide range of uses including controlling hydroponic pumps, simple CO2 controller, turning on and off ozone generators, running exhaust fans, etc. ART-DNe timers are rated for 15 amps @ 120 volts. Three year warranty.
I’ve been running this timer for about a month now (as of March 30, 2011) and I’m quite happy with it. I intend to include it as part of any kit that will run a timer controlled pump that runs an indexing valve system and I would also recommend this timer for most situations where a 15 minute increment timer might also work. I’ve had even a higher quality mechanical timer fail before. This timer has the benefit over the Titan Appollo 2 in that the day/night or always is controlled by a switch instead of requiring some combination of nob turns at power up to set it. It also has a really handy reset button to restart the cycles at the press of a button.