2007-03-27 13:59:41 · 2 answers · asked by selina akthar 1 in Health ➔ Diseases & Conditions ➔ Respiratory Diseases
If you examine pond water without culturing it, you'll probably find the protozoa are somewhat difficult to find because they are not present at high density. To increase the protozoa density, make a hay infusion by putting the water in an open jar and adding cut dried grass or hay. The grass or hay should be green when it was cut and dried, and be free of herbicides and pesticides. You may also wish to add a few grains of yeast and a few drops of skim milk. The sugars in the dried grass or hay and the nutrition provided by the yeast and milk provide food for the bacteria in the water. If the jar is kept at room temperature for a few days the bacteria proliferate (and make quite a smell!). The bacteria are food for the protozoa, so the bacteria population boom will create a corresponding protozoan population boom.
2007-03-27 14:26:24 · answer #1 · answered by Chez 4 · 1⤊ 0⤋
Do you mean Hay Fever that few rural teens got ?
2007-03-27 14:08:32 · answer #2 · answered by Anonymous · 0⤊ 1⤋