yep, actually all tanks should be based on lumens, but that changes with acrylic covers, humidity, etc. and is not easy to measure; so people use watts. but 20 gallons qualifies for medium size.
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Eheim Pimp #296 Eheim Ecco 2232 (x2), Eheim Ecco 2234 (x1)
Lizards: Leopard gecko dessert Gold dust day gecko jungle
Tanks: 20 Gallon Long: community: JOURNAL!! Eclipse 3: betta tank: JOURNAL!! 6g reef: clown pair tank 40g Finnex Reef
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