10 hours is more suited to a high tech planted system with co2 and fertilizers and such. An option would be to get a blue moonlight tube to supplement your existing lighting. That way you can still see the fish without fueling the algae, it looks cool too, and if you have semi nocturnal species you will see them more. Actually depending on the size of your tank there are are small blue led systems available that are reasonably cheap to buy and cheap to run. i have one running on my 24 inch tank and my father has one on his 39 inch tank.