INSTRUCTION MANUAL
Tips
• The Grow Flow is for indoor use only.
• Set up buckets, controller, and reservoir all on the same flat, level surface. Make sure all tubing
going to the grow sites is flat along the same level surface.
• Don't move the buckets while they are filling/draining, as this may cause flooding.
• Don't fill reservoir while the buckets are filling/draining. Add to the reservoir only after drain
cycle has finished (controller and buckets are empty).
• Use a 110-120V, 60Hz power source with this system.
• Change nutrient solution in reservoir every seven to 10 days.
• Clean out pump filters and the vacuum break elbow fitting hole, as well as check float switches
for obstructions as needed.
• Many plants require 3–4 cycles per day for optimal growth. Excessive cycling will cause
premature pump failure.
• Regularly inspect all tubing for kinks and cracks.
• The Grow Flow Controller Bucket System is equipped with an overflow safety float/emergency
switch on the inside of the top of the bucket. If one of the upper adjustable float switches were
to fail, this switch will act as the first failsafe upper float switch. NOTE: This switch will only
prevent flooding with buckets 12" or taller.
TroubleshooTing
• Green LED(s) doesn't come on: Verify that the power supply and plug connection are good.
• Pump doesn't work but LED(s) come on: Move pump around while submerged to let out any air
bubbles trapped inside.
• Controller bucket fills up, but some/all grow sites don't fill: Tubing or a fitting is clogged. Drain
as much water as possible back into the reservoir. Begin searching for the clog by removing the
fitting and tubing that goes to the bucket(s) that didn't fill up. Flush fittings & tubing with water
to isolate the obstruction. Once found, clean out or replace fitting/tubing.
• "Switch Error" light on timer box is flashing: The safety overflow switch has been activated,
possibly caused by a defective upper float switch. Unplug the controller, wait ten seconds, then
plug back in to reset it. If the light continues to flash, contact technical support at 1-800-634-
9990 ext. 180 or email support@hydrofarm.com.
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