What makes you think it's the lights?
Algae growth may ramp up some if the spectrum of light shifts more to red, but your leds shouldn't have that problem. That is a concern for 1 year old fluorescent bulbs, not leds.
I'm surprised that the Reefbright XHO led website page doesn't state what wattage these leds are, but I suspect they are 3 watts. I seriously doubt that the leds are the issue.
I suspect you may have other issues at fault.