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right now the cheapest place I've seen is e-shine systems. But they only communicate via e-mail or chat through a translator and who knows the quality of the LEDs from taiwan/china. I know a few are being tried out right now. One other product was tried and it the fixture fried after a month or so because of moisture. Most 1W or 2W LED grow light fixtures have a fan to cool the PCB so you can't really use them in an open scrubber design, or even over an open sump where moisture gets drawn into the fixture. So the LED fixture route is really something that takes a little forethought.
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Algae Scrubber Basics!!! GOOGLE "algaescrubber zoho"
General Interest Forums --> Advanced Topics --> Algae Scrubber Basics (sticky)
--> POSTS #3251-64 (Basics), #5206 (Cleaning), #6884 (LEDs), #729
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