This article was co-authored by Doug Ludemann and wikiHow Staff Writer Daniel Blinka, MA, MPA. Doug Ludemann is the owner and operator of Fish Geeks, LLC, an aquarium service company based in Minneapolis, Minnesota. Doug has worked in the aquarium and fish-care industry for more than 20 years, including work as a professional aquarist for the Minnesota Zoo and the Shedd Aquarium in Chicago. He received a Bachelor of Science in Ecology, Evolution and Behavior from the University of Minnesota.
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