You must certainly might be overfeeding. Try picking the most you can and make a big PWC
maybe 50%. Check on your skimmer a good efficient skimmer should be a good course of action. If you keep you lighting photoperiod to a 12-14 hrs a day, then it should be OK. IME
lighting affects more on hair algae growth. When feeding frozen foods try soaking/rinsing them in fresh RO
water for some time before feeding it so that the PO4s can leach into this water and not your tank. There is more info on the site you can search...