I prefer to keep my lights on a consistent schedule. That's just me, I don't have any evidence that using a weekend schedule would cause any harm. I'm a big believer in consistency (also known in my house as a control freak but what do they know.. anyway....) However , if you're fighting algae, have you looked at your feeding (possible overfeeding/type of food) , your water parameters, are you doing regular water changes (using RO
)? These can be pretty big contributors to algae issues as well as lighting.
Does your tank get direct sunlight?