Still have algae issues in 4 1/2 month old reef tank >:-(

[BC564]

Can you try cutting back your lights on time to around 6 hours with the whites...and have the actinics come on an hour earlier and stay on for an hour later.....so the total lights on will be around 8 hours.

Also can you check your phosphate levels.

When the tank was first started up....did you notice a tank cycle....