YELLOWISH THREAD ALGAE

Question
Dear Lee,
I have a 125 gal. aquarium.  My lighting is about 3 watts per gallon and the tank is heavily planted.  I have CO2 injection.  I'm getting  somewhat of a yellowish stain on my gravel/substrate, mostly in the front.  There grows a yellowish "thread algae".  It is easily removed with a toothbrush, as it tends to grow in clumps.  This is becoming a daily routine.  My lights are programmed for 10 hours per day.  My water has hardly any phosphate and my Ph is a constant 7.2.  I have 2 large Aqua Clear (110) filters which run continously.  It may be helpful for you to know that my tank is still going through it's Nitrogen Cycle; the ammonia is gone, but the nitrite is (still) high.  I belive the Cycle will be completed in about another 1-2 weeks.  However, in the meantime, this yellowish thread algae, which is slowing-down a bit, is becoming a nuisance.  Any ideas as to what might be causing this problem?
Regards,
Dave M.

Answer
Most likely your algae problem is coming from the length of time you have your lights on along with your lights stimulating plant growth if your plant is heavily planted with live plants. Alternatives to improve your algae solution is difficult because if you have live plants they need a particular amount of light for them to be successful. I would look at all styles of plants I have if they are live and find out the maximum amount of time needed and cut my lighting down to that. If you have plastic or silk plants you can cut down the lighting time drastically which will help slow the algae growth. Best of luck......