White On Hydroton Grow Medium

Alpha_Male · #1 (**permalink**) 08-26-2009, 02:13 AM

So lately I've been noticing some white substance on the hydroton rocks. I'm thinking it might be calcium but there are no white balls in my reservoir and I use General Hydroponics Hard water Micro. Then I thought it might be a mold or something. Pictures and set up below.

System: Flood & Drain Hydroponic System - On 15minute every hour from 6am to 11pm and 15min on every 2 hours from 1am to 5am.
Nutrients: General Hydroponics Micro & Grow
PH: 5.6-5.8
Grow Medium: Hydroton Grow Rocks
Lights: (2) 100watt 65k CFLs - approximately 8-10 inches above 11 day seedling.
Temperature: 75-78 degrees Fahrenheit
Humidity: ???
Grow Space: Closet grow approximately 2'x2'x4'
Ventilation: (2) 4" fans every 15 minuets with (1) 10" oscillating fan 24 hours. refrigerated air.

MagniKhan · #2 (**permalink**) 08-26-2009, 07:58 PM

Probably a little mold, usually starts on rocks that get wet with nutes. Mix some H2O2 with some water and spray the spots. If that is the only area getting wet on the surface, then cover with some more rocks.

Alpha_Male · #3 (**permalink**) 08-26-2009, 09:53 PM

What hydrogen peroxide to water ratio should I use? I know it wont hurt the plant but just want to be safe cause it's a third generation hydro seed.

Thanks for the input!

MagniKhan · #4 (**permalink**) 08-26-2009, 10:46 PM

Hydrogen peroxide,3:1 ratio, 3 parts water, 1 part h2o2, just mist , don't soak. Unless your in the EU and you can get 35% Hydrogen peroxide then I think it's more like 10:1.

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#1 (permalink) 08-26-2009, 02:13 AM
Alpha_Male Registered User Join Date: Jun 2009 Posts: 53	White On Hydroton Grow Medium So lately I've been noticing some white substance on the hydroton rocks. I'm thinking it might be calcium but there are no white balls in my reservoir and I use General Hydroponics Hard water Micro. Then I thought it might be a mold or something. Pictures and set up below. System: Flood & Drain Hydroponic System - On 15minute every hour from 6am to 11pm and 15min on every 2 hours from 1am to 5am. Nutrients: General Hydroponics Micro & Grow PH: 5.6-5.8 Grow Medium: Hydroton Grow Rocks Lights: (2) 100watt 65k CFLs - approximately 8-10 inches above 11 day seedling. Temperature: 75-78 degrees Fahrenheit Humidity: ??? Grow Space: Closet grow approximately 2'x2'x4' Ventilation: (2) 4" fans every 15 minuets with (1) 10" oscillating fan 24 hours. refrigerated air.

#2 (permalink) 08-26-2009, 07:58 PM
MagniKhan Humble Student Join Date: Jul 2009 Posts: 313	Re: White On Hydroton Grow Medium Probably a little mold, usually starts on rocks that get wet with nutes. Mix some H2O2 with some water and spray the spots. If that is the only area getting wet on the surface, then cover with some more rocks. __________________ " The world ain't all sunshine and rainbows. It is a very mean and nasty place and it will beat you to your knees and keep you there permanently if you let it. You, me , or nobody is gonna hit as hard as life. But it ain't how hard you hit; it's about how hard you can get hit, and keep moving forward. How much you can take, and keep moving forward. That's how winning is done." Rocky Balboa

#3 (permalink) 08-26-2009, 09:53 PM
Alpha_Male Registered User Join Date: Jun 2009 Posts: 53	Re: White On Hydroton Grow Medium What hydrogen peroxide to water ratio should I use? I know it wont hurt the plant but just want to be safe cause it's a third generation hydro seed. Thanks for the input!

#4 (permalink) 08-26-2009, 10:46 PM
MagniKhan Humble Student Join Date: Jul 2009 Posts: 313	Re: White On Hydroton Grow Medium Hydrogen peroxide,3:1 ratio, 3 parts water, 1 part h2o2, just mist , don't soak. Unless your in the EU and you can get 35% Hydrogen peroxide then I think it's more like 10:1. __________________ " The world ain't all sunshine and rainbows. It is a very mean and nasty place and it will beat you to your knees and keep you there permanently if you let it. You, me , or nobody is gonna hit as hard as life. But it ain't how hard you hit; it's about how hard you can get hit, and keep moving forward. How much you can take, and keep moving forward. That's how winning is done." Rocky Balboa

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