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  1. Beginner Planted Aquarium
    Hi. I read Hoppy's article on PAR and didn't understand too much except uMol / m2 / sec. I would like to calculate PAR for my tank and tube and hopefully be able to compare it to others'. My tank is a 10 gallon. ~11" from tube to substrate, 20" long, 11" wide. The tube is T8 Aqueon 15W 18"...
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