@Dirtydave you are correct, I was just measuring roughly from the water line to below the substrate... my bad. I may consider replacing the Aqueon LED with the Fluval 3.0. I know the Aqueon is not doing much... it was the first light I purchased and was a mistake. 2 Finnex Planted + lights and a Fluval 3.0 should provide plenty light I would think for a 75gal.