I've had a 55 gal
tank for about 5 1/2 months now and I recenty installed a wet/dry to replace my undergravel. Also I shoveled out the crushed coral I was using and replaced it with a mix of live and dead argonite sand. But when I did this brown alage started growing all over the sand. When the tank was new there was brown algae at first but it died off and now its everywhere since the new sand was put in. Any ideas why or what to do about it.
P.S. my lighting is power compacts at 260 watts