Hi. I have a question about testing my soil's pH. I have a TON of aquarium testing stuff (pH, nitrogen, etc), although I'm shutting down my aquariums. I'm wondering whether anyone knows if/how I can use the water testing kits to test my *garden soil* pH and nutrient levels. (I find proprietary soil testing kits ridiculously expensive, at least in Toronto. I tried one of those inexpensive insert-the-prong testers but it was very inaccurate.)

I think I read somewhere that you can take a sample of soil, add water, let it settle for several hours, and then add the aquarium pH-testing material to the water to get an accurate reading of the soil pH.

Has anyone heard anything about this, or have any experience with it?