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A hyper-text version of A Modern Herbal, 1931, by Mrs. M. Grieve. Over 800 varieties of medicinal, culinary, and cosmetic herbs, including economic properties, cultivation and folk-lore.

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pH Contol

General Hydroponics
pH Contol
General Hydroponics
To maximize plant growth, the pH content of your nutrients should be slightly acidic. Experienced growers consider the ideal pH for most crops to fall between 5.5 and 6.5. Users of General Hydroponics nutrient products generally do not experience problems maintaining the proper pH range because our formulas are pH buffered. However, some important exceptions do exist. Acid content can reach unacceptable levels when nutrient solutions are mixed with poor quality water, or pH unstable media - such as rock wool and gravel products - are used, and when high plant growth rates destabilize the nutrient mix due to rapid nutrient absorption by the crop.
 pH Up (Base)

General Hydroponics
pH Up (Base)
CAN NOT be shipped to Canada
CAN NOT be shipped by US Mail

Quart - List $10.76  Discount - $9.10
Gallon - List $26.90  Discount - $23.07
Qty:

pH Down (Acid)

General Hydroponics
pH Down (Acid)
CAN NOT be shipped to Canada
CAN NOT be shipped by US Mail

Quart - List $12.95  Discount - $10.35
Gallon - List $29.98  Discount - $23.07
Qty:


Calibration Solutions

General Hydroponics
pH 4.0 Calibration Solution
8 oz size
$7.54
Qty:


pH 7.0 Calibration Solution
8 oz size
$7.54
Qty:

General Hydroponics
EC Calibration Solution - 1500 ppm
8 oz size
$8.20
Qty:  

Electrode Storage Solution
Electrode Storage Solution
Use to store your pH meter electrode between use. This solution is designed to keep your electrode sensing membrane and reference junction clean and unclogged and ready for use. Store you electrode directly in a small cup of solution or saturate a sponge in the cap of your meter for storage between use. This will prevent your permeable glass membrane from becoming dry and from mineral deposits clogging the surface. This solution is designed to equalize the osmotic pressure of the reference solution in your meter junction to keep the reference solution from seeping out and prematurely aging your meter. Should your electrode membrane dry out soak it in this solution for at least two hours before use. NEVER STORE AN ELECTRODE IN DISTILLED OR DEIONIZED WATER.
8 oz. - Electrode Storage Solution
$10.00   Sale $9.00
Qty:   


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