I suggest picking up the Hanna Phoshate checker, not the ULR since your levels are high. It will make testing easier.
Also, there is no reason to panic about high phosphates. My tank ran high phosphate (over 2.00) for years without any problems at all. Richard Ross also ran high phosphate for years with no issues, and I'm sure there are others.
I have recently been lowering my phosphate levels to see if it makes any difference in my tank. I use Randy's DIY LaCl recipe and then dilute it with 4 parts RODI and then just dose it into my sump and don't worry about filter socks. It's a lot easier and if you go slow there's no tank clouding or anything but it could take months to bring down to where you want it. As you lower phosphate in the water column, the old rock will release more to equalize. Just test once a week and as long as you see it coming down a little, stay the course. I also have tanks and they have been unaffected using this method.
Good luck. Don't panic. Nothing good happens quickly in a reef tank.
Also, there is no reason to panic about high phosphates. My tank ran high phosphate (over 2.00) for years without any problems at all. Richard Ross also ran high phosphate for years with no issues, and I'm sure there are others.
I have recently been lowering my phosphate levels to see if it makes any difference in my tank. I use Randy's DIY LaCl recipe and then dilute it with 4 parts RODI and then just dose it into my sump and don't worry about filter socks. It's a lot easier and if you go slow there's no tank clouding or anything but it could take months to bring down to where you want it. As you lower phosphate in the water column, the old rock will release more to equalize. Just test once a week and as long as you see it coming down a little, stay the course. I also have tanks and they have been unaffected using this method.
Good luck. Don't panic. Nothing good happens quickly in a reef tank.