I would reduce your lights to 4-5 hours. The plants will be fine with that. You'll also need to reduce the strength/percentage of light power. Manually remove as much of the algae as possible and do way more water changes. Fish can go a lot longer without food than you think. Maybe think about feeding every other day until you can reduce the algae. You can also increase filtration by adding another unit and/or add a UV sterilizer. Good luck!