Obviously the limiting factor for most people is the microscope. If you have access to one, the materials to do a fecal float are relatively cheap, and there is really no reason not to do it yourself if you have a large collection and a microscope. BTW, fecal floats can be done without a "fecalizer".
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...the oldest task in human history: to live on a piece of land without spoiling it."
Aldo Leopold (1938)

"Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us."
Calvin and Hobbes (Scientific Progress Goes 'Boink', 1991)

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