No, but an auto top off is on our ever growing list of upgrades. I want it to keep the sump water level consistent for the skimmer. The group buy on the DIY (by the way we are doing this with the Atlanta Reef Club..you might ask the Columbia about it if you are interested) we are getting a mark down off the prices shown on the site.
I'm not sure if I want to do the DIY dosing or get one premixed. Obviously the DIY will be more economical but I'm not wild about a daily dosing plan and lots of storage room needed. I guess I had better add a fish room to my ever growing wish list huh?
And yes, I'm not concerned about the phosphates long term, I'm going to do a midweek water change and see if that doesn't help.