I am pretty new here so don't take my word for it but..... I think weekly PWC
of about 10% is good. With that, you don't need to dose much of anything in a reef. Of course you are going fowlr
so the dosing wouldn't apply. I have seen lots of threads claiming they go months without PWC
and have for years. I think those people have all the equipment and know how to keep it running great. For someone who doesn't eat, drink or sleep this hobby, I think you will do well with weekly. Just my opinion.