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Re: : Daphnia culture flourecent distance

I place a 40 watt  shop light containing 2 cool white bulbs directly over
(3) 30 gallon tubs...the light actually sits right on the top edge of the
tubs.  I collect thousands a week and the culture has been going strong for
5 years.( Totally break down one tub each month.)

Norm in Somers WI