I have worked with both types, and the homemade one seemed to work
better than the Flot-Tech. There was much better control of the gentle
turbulence coming from a standard shower head in the lower part of the
tank. We have had good success simply skimming the light fraction with
what is basically an oversized tea strainer. We never got to the point
of testing the accuracy of ours other than counting out some poppy seeds
to use for it.
Jane L. Brown
Anthropology/Sociology
Western Carolina University
Cullowhee NC 28723-9646
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Phone: 828-227-2444
FAX: 828-227-7061