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    08-17-2012, 03:20 PM
    This is all natural and has been said over and over again to work the best for spider mites SNS 217 Spider Mite Control Spray | Sierra Natural Science Give them a call, send them an email, get a free sample and watch them disappear. :thumb:
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About Scientific

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About Scientific
Real Name:
Call me Ishmael
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Hermie ;)
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The enlightened West Coast legalized zone
Occupation:
Writer
Hobbies:
Agronomy
Favorite Strain:
G-13
Favorite Quote:
I am human, therefore nothing human is alien to me.
Biggest Achievement:
Coming soon
Do you use Cannabis for Medicinal Purposes?:
Yes

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Recent Entries

#1 pH Measurement Mistake: Storing the Probe Tip Dry

by Scientific on 11-10-2017 at 08:29 AM
#1 on Hanna Instruments' list of no-nos is storing the glass measurement electrode at the tip of the meter dry. (You should store the electrode immersed in storage solution, or at least pH 7.0 calibration solution (which is what they do in most labs).

Storing the electrode dry can cause a coating to develop on the electrode that makes your meter slow to respond and unstable.

(You shouldn't store the probe tip in water either. Most labs store it in pH 7.0 calibration
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Categories
Nutes , pH

Preparing a Soil Sample for pH Measurement (Video from Hanna Instruments)

by Scientific on 11-10-2017 at 08:12 AM
Here's a two-minute video about how to prepare a soil sample from from Hanna instruments, a big international company that has been making pH meters for decades.

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Categories
Nutes , pH

Making a DIY Air Pot from Hardware Cloth and Burlap and Preparing Coco Coir

by Scientific on 11-08-2017 at 08:40 PM
I wanted to experiment with coco coir and pots that let lots of oxygen get to the roots, but air pots are annoyingly expensive. (The other option for lots of air to the roots is a cloth grow bag.)

Here's how I made a pot from scrap that was lying around and used Nebula Haze's process for preparing the coco coir.


Scrap piece of 1/2" hardware cloth and a burlap coffee sack.
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DIY , Coocoo for Coco

Great read at General Hydroponics : "Advanced nutrient management for hydro growers"

by Scientific on 11-08-2017 at 08:26 PM
I point people to the post "Advanced nutrient management for hydroponics growers" all the time because it's a great, authoritative rundown on the fundamentals that we all wonder about.

It covers:
  • Water quality
  • Water temperature
  • Water pH
  • Growth media
  • How often to change hydroponic media
  • Pathogens
  • Optimization

Great info. I go back and re-read it every now and then. Take a look!
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Hydroponics , Nutes

Add Ca/Mg and Si First, then Micros, then Everything Else

by Scientific on 11-08-2017 at 08:18 PM
An article titled "Nutrient Questions" at the General Hydroponics website says that when mixing nutrients you should add them to the water in this order:
  1. Silicon and Ca/Mg supplements (for example Armor Si and CALiMAGic)
  2. Micronutrients (for example FloraMicro)
  3. Anything else (for example FloraGro and FloraBloom)

I would be willing to bet that that advice applies to just about any fertilizer system out there, regardless of brand (but do check).

I haven't
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Hydroponics , Nutes

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