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Page 18 of 47
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Nutrient Pump
runs on a timer for Ebb & Flow or Drain To Waste systems, or runs all the
time for Aeroponic, DWC and similar. Check the one that is closest to what you are doing.
If you’re running Ebb & Flow (on a timer), you have up to four (4) separate feeding schedules
you can run each day. The simplest thing is to choose a Start Time, Set Minutes to Feed and
Every hh:mm to what you want, like:
This starts pumping a
8:00 am and feeds for 6
minutes every 2 hours
and 15 minutes.
So you’ll feed for 6
minutes at 8:00, 10:15,
12:30, etc.
If you want to change cycles timing during the day, add more Start Times and GroBot will feed
on the schedule you set by breaking the day into parts. This is common in greenhouses where
you want to feed more often as the sun climbs higher and the greenhouse heats up. Daily
Feeding can optionally stop at the time you choose, and some growers maintain there’s no
point in feeding at night. If you leave it blank, that means feed 24/7.
After feeding, the GroBot waits 15 minutes for the waste to drain back before refilling and re-
dosing the reservoir.
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Drain / Refill
counts down the number of days until drain, and starts that cycle at whatever
time you specify. You choose a number of days from now to repeat the cycle
GroBot EVO drains your res until it gets to 2 inches of water, then keeps draining until there is
no change in level for approximately three (3) minutes. This allows GroBot to pump the res
dry without burning up your pumps. You have a total of 60 minutes to drain or the ‘Bot
assumes something went wrong and will abort the drain cycle and email you about it. It will
also set your Drain Channel to 0 so that it won’t try to drain again until you fix the pumps.
Water Level has a minimum, and it’s four (4) inches. If you enter a smaller number, GroBot
will change it to 4.00 to prevent setting the FULL level so low that nothing works. Ebb &
Flow flooding will still happen with a disconnected sensor, but Drain / Refill and automatic
level maintenance will not. You’ll get an email on it. You have a total of 60 minutes to Fill
your reservoir or GroBot assumes something went wrong and will abort the fill cycle and email
you about it. It will also set your Fill Channel to 0 so that it won’t try to fill again until you get
things fixed.
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External Timers
run Day, Night or Both for the On time and Off time you set. Great for
aeroponic misters, air stones, that sort of thing.