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Re: compost tea
Hi Roberto -
I'd take some of your soil and add it to a good compost. Compost has more organisms per gram than soil does. So you are going to get a better inoculum using compost.
You need to make sure there's enough aeration to offset the use of oxygen by the microbes. You have to balance oxygen use with aeration rate. That's why it might be better to buy an existing machine. The KIS machine is really simple, and is easily shipped.
Otherwise, you need an oxygen probe to measure oxygen in the tea to make sure it stays aerobic THROUGH THE WHOLE BREW. The critical hours are 8 to 14 in a 5 gal brewer, or 14 to 20 in a larger size brewer.
Hope this helps!
Elaine Ingham
President, Soil Foodweb Inc.
www.soilfoodweb.com