solids removal is critical.. one thing about algae, i had a big bloom a few weeks after i added my fish, so,
i kept a tarp over my outdoor tank that i removed at night, also used a little 4 watt "pond light" to attract bugs... i put the light just under water pointing up, right by one of the growbed drains, anyways, the bloom died out after a few days, and from what i've found, the decomposing algae release something that inhibits future algae growth.. i'd keep at least a shadecloth over my tank anyways
now that my system is in the basement, i have a flourescent light over the big tank that is on about 14 hours a day