I see no phosphate test results above. You should test for that too.
One thing to keep in mind is that algae needs nutrients to grow. No matter what your tests say, those nutrients are in the system if the algae is growing. What happens is the algae consumes the excess nutrients faster than you can test for them. Decreasing the photo period helps sometimes, but it's not usually a permanent fix.
I agree that you need to get a full clean up crew. I would get mostly snails including ceriths and nassarius. I also like shrimp because they are fast and good scavengers. Also, I suggest upgrading your skimmer. Sea clones aren't very good. Also, do you have bio balls in the wet/dry? They could be collecting nitrates if not cleaned enough. Also, try to think of any other place where nitrates could accumulate (sponge filters, dead flow areas, etc.).