The Planted Tank Forum - View Single Post - 20g long high light
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post #1 of (permalink) Old 04-25-2013, 11:00 PM Thread Starter
Planted Tank Guru
Join Date: Jul 2011
Location: Royal Oak, MI
Posts: 2,245
20g long high light

A t5ho 49 watt over a 20 gallon long would be considered high light, right? at this point would you need C02?
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