Mar 23, 2013 #1 swifty Aquarium Advice Freak Joined Jul 6, 2008 Messages 282 Location California Does it matter when you dose excel? Does it have to be right before the lights are on?
Mar 23, 2013 #2 jetajockey come get me tang police! Joined Apr 25, 2011 Messages 12,046 Location In a swamp near you /Pensacola, FL I'd dose it around the start of the photoperiod so it has the most time to be utilized.