How to Clean Hydroponic Equipment With H2o2


Hydroponics free gardeners from the hassles of weeds, pests, and early frost, but they are not completely maintenance-free. Sprayers can get clogged with mineral salts from the nutrient solution, tubing can become grimy and algae and fungus can grow in the nutrient reservoir. Cleaning debris and residue from the system does not have to be a complicated task. In fact, the same system that provides nutrients to your plants can take care of the cleaning as well.

Clean Your Hydroponic Equipment

Step 1

If you have an active hydroponic system, stop the pump. Drain the nutrient reservoir into the bucket and discard the used nutrient solution. You can also recycle this solution by using it to water your soil garden or your lawn.

Step 2

Use a clean rag or paper towels to wipe down the grow tray, nutrient reservoir, sprayers (if you use them) and drain fittings. Clean off as much excess residue as you can.

Step 3

Refill the nutrient reservoir with clean water. Allow this to sit uncovered for at least an hour to allow any chlorine present in the water to dissipate.

Step 4

Add to the nutrient reservoir 3ml of 35 percent H2o2 (hydrogen peroxide) per gallon of water. Mix well.

Step 5

Turn on the pump (if you use one) and let it run continuously for 24 hours. This will thoroughly clean out the tubing, sprayers, drain fittings and every other part of the system that comes in contact with the water.

Step 6

After 24 hours, turn off the pump and drain the H2o2 solution from the system. Discard this solution.

Step 7

Refill the nutrient reservoir with plain water and allow this to sit uncovered for an hour. Add concentrated nutrient solution, following the manufacturer's instructions, and re-start the pump.

Tips and Warnings

  • Always wear rubber gloves when working with the H2o2 solution. It is not the same as the hydrogen peroxide you buy in the pharmacy. 35 percent H2o2 is a highly caustic substance that can cause chemical burns if it comes in contact with your skin. If your system is not designed for continuous pumping, monitor the system for leaks and overflows while the H2o2 solution is being pumped through.

Things You'll Need

  • Plastic bucket or storage bin the same size as your nutrient reservoir
  • Clean rag or paper towels
  • Rubber gloves
  • Water source
  • 35 percent H2o2 (hydrogen peroxide) solution, available at garden centers and online
  • Concentrated nutrient solution, available at garden centers and online


  • Soilless Culture: Growing Green Innovations
  • University of Florida Extension: Vegetable Production Handbook

Who Can Help

  • DIY Hydroponics - Nutrient Solution
Keywords: H2o2 hydroponics, clean hydroponic equipment, flush hydroponic system

About this Author

Tricia Ballad has written professionally since 2004. She has authored three books, as well as numerous articles on parenting and website content involving green living. Her work has appeared in Natural Family Online and Budget Artists. She holds a Bachelor of Arts in English with a creative writing specialization from Bradley University.

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