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Changing nutrients under a DWC ScrOG

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Changing nutrients under a DWC ScrOG

ScrOGging with Deep Water Culture (DWC) presents unique challenges compared to other methods of growing under a ScrOG. The biggest issue DWC growers struggle with is topping off and changing out nutrients (nutes). However, DWC growers can enjoy all the benefits of ScrOG without ever removing the net pot, disturbing the plant, ScrOG or root zone with this simple method. 

2 x 5 gal DWC individual ScrOG
2 x 5 gal individual portable DWC ScrOG using P SCROG Primary Kits

2 x 5 gal DWC framed and fixed 2x4 ScrOG
2 x 5 gal DWC under framed and fixed P SCROG 2x4 Kit

Like anything else, there may be many solutions to this issue. One solution you may find quite useful involves exchanging nutes with a pump and topping off between changes with a watering can.

Nutes can be changed using a common small utility pump found at most hardware stores.

UTILITY PUMP 

AmazonHome Depot, Lowes

It is best to prepare your buckets at the beginning of the grow. Drill a hole in your net pots big enough to receive the end of a garden hose and buy rubber stoppers to plug holes when not in use.

Netpots with rubber stoppers

Amazon, Home Depot, Lowes

The pump utilizes common garden hoses to transfer liquids. In the case of DWC, the nutes are sucked into the pump and pushed out the other end. The flow is unidirectional so the gardener uses the pump's input to suck old nutes out. Then the pump's output hose is used to push old nutes into an empty "old nutes" bucket. Old nutes can be used on outdoor plants, don't throw them away!

The pump's hoses are reversed to add new nutrients to your grow's DWC buckets. Then the pump's input hose is used to push fresh nutes into your grow's buckets.

Pumping nutes

IMPORTANT!

DWC reservoirs of healthy cannabis plants are full of robust and abundant root systems that will burn out your pump if sucked into the intake side. This is easily addressed with "hose filters" found at hardware stores. Some pumps come with filters.

The filter should be placed in the end of the hose that goes into the reservoir, not the end that screws onto the pump. This placement makes it easier to clear any accumulated debris during pumping.

 Hose filters

Hose Filters
Amazon. Home Depot, Lowes

Root debris will accumulate in filters during the process and should be kept clean to avoid blockage and burning out the pump.

In between exchanges, nutes can easily be topped off using a common watering can through the same holes.

Watering can

 

Note

Reservoirs and root zones can be kept clean through use of H2O2 after each nute exchange and/or through the use of Hydroguard.

 

If you have another solution you would like to share, please reply to this ScrOG blOG.

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  • Gary Memelstein
Comments 1
  • b.love
    b.love

    you scrogger peeps are the hope for healing human kind… may you live long and prosper!

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