hello,i have a 30 gal 36"x18" with 2 55 watt pc (in 1 strip) and 1 coralife 10000k and 1 triton flor. both 30w(in 1 strip).what im trying to find out is how long to leave the pcs on?i have been getting really bad red alage on the bottom.i was keeping both strips on for 10 hrs but have cut the...