PH Indicators
Posted: Friday, December 18, 2009
by Robert Wright
UsaveHydroponics
The pH indicators, are undoubtedly the simplest and the most reliable method of measuring nutrients pH. I would get the one that has an index card showing the color code. They will not distinguish between, for example, a pH of 5.2 and 5.3 wide range' pH indicators within the optimum pH range 5.0 to 6.5 easy to detect the color resolution.
Fast and user friendly
It's very accurate and reliable
It's easy on the pocket book starting out
The pH Indicator Colors is listed in a color code on the side of a squeeze bottle that you can see clearly. It has one problem is when squeezed to get the solution out the color code will rub off this is why I would look for the one that has the color chart that comes with a plastic vile to test sample nutrients pH level. I can't emphasize enough that the water and nutrients have to be mixed correctly to get the correct reading. Water, which is too alkaline, can be adjusted using nitric acid, sulfuric acid, citrus acid, (Vitamin C) or vinegar adjusts with small increments of chemicals. Water, which is too acid, can be neutralized using bicarbonate of soda, wood ash, or by using dolomite Lime in the medium. The color chart will show the color of the test to find out if you need to adjust the solution up or down. It's time to add your drops to your sample nutrient solution that you have mixed to feed. This will show the color code by shaking the small sample of nutrients, water, and the drops of the solution to find out what color your pH level from the color chart will tell you if you need to add pH up or down with the eye dropper.
Microbes growing in the medium also change the pH. This is the reason you need to check you're run off to see what your soil pH indicator is biweekly check.
The test is conducted by removing a sample of nutrient from the reservoir, or by a gallon jug. It will register pH 5.0 is red orange color', pH 5.5 is orange yellow color', and the pH 6.0 is yellow in color,' and the pH 6.5 is a pale green color'. I find it better to make sure that I used a couple tablespoon of Dolomite Lime to buffer the 3gallon container so that the pH will never go over 7.0. The pH Indicators works by the principal of adding this particular dye used in the indicator formulation is depending on the pH of the solution. This is where you have to make sure you take a small sample of the mixed nutrients and the water or reservoir pH level that you are feeding your plants. Compare the color on the color chart to make sure the pH is correct. I usually bring my pH level down from 6.0 then move up 6.3 with top off of water.
The pH is the measure of acid-alkalinity balance of a solution. It is measured on a scale of 0-14, with 0 being the most acid, 7 being neutral, and 14 being most alkaline. Ideally the range should be about 6.2 6.8. Most nutrients the plants use are soluble only in a limited range of acidity, "between 6 to 71/2," neutral. Should the water become too acid or alkaline, the nutrients dissolved in the water precipitate and become unavailable to the plants. When the nutrients are locked up, plant growth is slowed. Plants growing in an environment with a low pH indicator will be very small. Plants growing in a high Ph indicator will look pale and also stunted growth.
This is the reason that you need to be on top of your pH indicator chart and remember water is adjusted after nutrients are added they change the pH indicator color code chart.
P.S. It would be advisable to get the 12oz bottle pH indicator solution that will last for several crops and under $10.00. Then all you need is an eyedropper for you're up and down solution that you will be adding to your nutrients when you feed. I would purchase a few eye dropper go over to Wal-Mart and your in business.
Practice testing your water, but always make sure you mix your nutrients and the water together before you make your test use RO water or distilled water works the best. If you can't afford the water make sure a five-gallon bucket sits out to burn off any chlorine by keeping the lids off so it can extinguish. I mix and stir to make sure every solution is mixed well before I check the pH indicator color code chart to see if I am in the range 6 to 7.
When figuring the cost of a new pin and the maintaining constant up keep (i.e. cleaning, calibrating, and storage solution your looking at close to $300.00 for a pH (EC) and TDS meters and the pH buffer 4.0 & 7.0, Electrode Cleaner, Up, & Down, storage cleaner. Be sure to count up the cost before investing in an Electronic pH & Conductivity meter.
Article By: Robert Wright
http://www.usavehydroponics.com/
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Top-level comments on this article: (1 total)sweet ray im back on the internet looks goodThanks for viewing my article hope it helps when buying the correct PH Indicator.Happy New-Years! Robert!
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