I have used a combo of
po4 remover (PhosBan reactor),
UV and skimming. Skimming is probably the most under rated solution for
PO4 issues. Cutting down feedings is not likely to produce much relief unless you are very seriously over feeding. Having a skimmer that is producing about a cup of 'green tea' colored skimmate a day is a good start. If you find the skimmate is lighter in color, you can back off a bit. If you find it is darker then you need to increase skimming. With out going into some super long post,
PO4 removers (filter pads, media, etc) can be a real tool as
po4 can become sort of embedded in the live rock/substrate over time. You end up battling not only what is adding to the problem, but also having to rid the 'embedded'
po4 first. (Sort of like getting to the root of the issue..) I have found from personal experience keeping the glass free of coraline algea will help too. So many times I see hair algea taking root in the coraline algea, so scrap away and suck out as much you can. If you don't think your skimmer is up to snuff, consider a couple water changes / month. Checking your
RO/
DI or top/mix water is good too. While most salts introduce some level of
po4, starting off with a high level (.25ppm or more) will only exacerbate the problem. As a note, it takes quite a while to get the algea under control much less get rid of it. Getting some turbos or tangs is fine, as long as you are addressing the root cause. (And are willing to house the tang as it grows, etc)
GL!