Mar 17, 2011 #1 Rscomia Aquarium Advice Addict Joined Dec 19, 2010 Messages 1,010 Location West Plains Missouri Can anybody tell me if the watts per gallon rule apllies to actinic lights to?
Mar 17, 2011 #2 BigJim Aquarium Advice Addict Joined Jul 8, 2009 Messages 4,388 Location Oak Forest, IL It doesn't. Actinics don't put out light that photosynthetic organisms can use.