Cleaning your Grobo

Hi Growers,

There are two types of cleaning that you can do to ensure your grow goes smoothly. The 1st is sanitation and the 2nd is sterilization.

Sanitation refers to the removal of all of the debris in your unit. It is important to keep your reservoir free of dead leaves, roots and floating things. Quickly remove any spilled nutrients, excess water, or dead plant material you find. Removing dead leaves immediately reduces the risk of having pests or diseases get a foothold in your system.

To clean your intake fans, inspect them monthly and clean with compressed air shooting from the inside out.

To clean the door window front or back, use a microfiber cloth. These are very sensitive and can scratch easily.

To clean the outside or inside metal, you can use isopropyl alcohol and a soft cloth.

To clean your wood top, non abrasive soap is best as it has previously been sealed with a varnish.

Sterilization refers to the removal of all pathogens in the system and concentrates on our deep water culture tank. Here we use a solution of 50/50 water to distilled white vinegar to eliminate any bacteria, fungus, spores or viruses that may have found their way into our system. You can perform a final tap water fill and then drain to ensure that there isn’t any residuals on the tank. To clean the tank and lid:

  1. Prepare a solution of 50% water (tap is fine) with 50% vinegar.
  2. Remove the lid from the tank and scrub the underside with the solution. Rinse well and allow to dry.
  3. Drain your unit.
  4. Fill a bucket with the solution and fill the unit. Allow the unit to soak for 30 minutes.
  5. Drain your unit.
  6. Using an abrasive scrub brush and the remaining prepared solution in the bottom of the tank, scrub the sides and bottom of your tank.
  7. Fill your unit with clean water, then drain again. Wipe out the excess water in the bottom with a sponge or paper towels and do a final wipe down of all surfaces. Be careful cleaning around your water level sensors!
  8. At this point you can select a new recipe and start a new grow.

Bonus cleaning If you notice your airstone is slowing down the flow of bubbles into your tank, you can clean it too. After step 7 above, prepare a 35% hydrogen peroxide solution (mixed 1/1 with water) and pour enough into your tank to cover your air stone. Let the system sit for an hour, then fill and drain your unit. One final wipe down and you are ready to fill your unit and begin growing again!

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@Stephen I assume this would be best practice after each grow?

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Hi @rainstorm3,

Absolutely right on. I would even consider sterilizing your dwc tank after a failed germination or early seedling death. The Grobo provides an ideal growing chamber, but some things can sneak in over time.

Think prevention.

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- - - [2018-04.29]:

Aug 29, '18 7:41 PM

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@Stephen,


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@rayforetube,

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Should the sensors be removed for the cleaning process, or are they ok with or benefiting from the water/vinegar solution?

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The pH of vinegar itself should be around 2-3. Mixing 50/50 with water would obviously raise that number a little. I really don’t think it would have any adverse affects on your probes.

In fact if any bacteria has found a home on your probes it would take care of them.

However I’m not an expert so please chime in if I’m wrong.

@Cornholio,
On our cleaning day, we hung up the sensors both up in the Flush water that came from the Grobo… Like this…



:wink:

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Do those probes need to be kept wet? I emptied and dried out my Grobo today, so they have been dry a couple of hours now.

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The pH probe does indeed need to be kept wet. The EC one should be fine it came in a dry tube to protect it.

Get your pH probe wet ASAP.

:green_thumb:

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Thanks so much for the heads up! I don’t know which is which, so I’ve got both probes soaking in distilled water now.

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- - - [2018-11.16]:

Nov 16, '18 4:40 AM

@Cornholio,

:wink:

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@Matty,

  • (Also Remember When You Do Your [Drain/Fills] Your Grobo Bubbler Will Not Bubble, Untill You Finish With Your Task):

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@Hayden_Gregory,

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@DRaider,

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@Stephane. My PH probe has unfortunately not been in water for a couple days. It is now in distilled water. Am I official screwed?

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Hey Pete you’re fine. If you have calibration solution 7.0, let her soak in that otherwise you should be fine soaking in tap water even.

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What @Osage said :stuck_out_tongue:

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Hey @Pete,

Get it out of the distilled water ASAP! Here is the official way to rehydrate your probe.HydratingProbe

If you don’t have the solution that came in the cap (and honestly, who kept that around?), you can rehydrate in tap water.

You will need to calibrate it after it has been soaking for 24 hours, so please contact support@grobo.ca and we will get you setup.

Stephen

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Good to know @Stephen. So it’s fine for our pH probe to stay wet in the grobo water but not good to rehydrate if it went dry?

What about the cheap amazon probes. I have one of those and trust me I don’t expect it to be accurate like the bluelabs probe but should I store it in a little cup with the above mention solution?.

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@Stephen. so I have officially started to soak my probes in tap water. I will contact the support team in a couple days. I actually did save the solution that came in the cap but it has evaporated. HaHa. where would I get that Bluelab ph Probe KCL storage Solution so that I will have it on hand in the future. Thank you so much for your advice. I feel stupid.

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Bluelab STSOL100 pH Probe KCI Storage Solution, 100ml https://www.amazon.ca/dp/B00CJIDH7Y/ref=cm_sw_r_cp_api_i_z7CBCb17AT85Y

:slight_smile:

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If you have a local hydro store, they’ll have it too most likely

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Hey @Stephane,

Yep, the pH probe is fine in the Grobo, as we dose the water soon after the distilled or RO water is added. (Even in the germination stage) However, if you are caught needing to re-hydrate your probe due to it drying out, don’t use RO or distilled. Think of it kinda like this…

You are in a large room with carpet, furniture, people and pets. The sound from your voice is absorbed by the room and at a nice understandable level when you speak. Remove everything from the room, and suddenly there are echoes and understanding you becomes much more difficult, eventually leading to madness. That’s kinda what happens with your probes rehydrating in ‘empty’ water. The probes lose their reference point due to changed chemistry in the probe itself.

Hope that makes some sort of sense…

Stephen

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