Worm bin pH, testing and adjusting.

Written by Matthew on September 12th, 2010
pH testing

Testing pH with litmus paper.

Ok so how do you use the pH and crushed limestone anyhow?

It is best to try to keep the pH around 6.5-7 in the worm bin. They are several different ways to test, but a good one is to add a few pinches of worm bedding to a few tablespoons of distilled water. Then you simply dip the test strip into the water and note the color change to the litmus paper. The paper will only stay the proper color for a short time, so note it quickly. Compare the color to the chart to determine the pH. The exact number is not extremely important so don’t be to concerned about getting precisely right. You just want to know if it is real acidic. If this is the case then time to start adjusting it with some crushed limestone. Acidic is any number below 6. Application of the limestone will raise the pH. This will not be an instant change and will take a number of applications over a few weeks to change.

The limestone is used by sprinkling a small amount (dusting) over the surface every other day or so. I like to do this just after watering. Once the pH is mostly balanced you can keep it in check by adding some limestone to the feed source before adding.

Keeping the pH in check helps to keep mites and a whole host of other problems in line. It is not so important I think if you have mild and cooler weather, but if it is real hot any added stress from pH seems to make the red wiggler worms suspect to other problems.


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