On Monday I was at 1.3ppm, so I will reduce some of the PHOSGUARD.Thats a little more sane
How much was the phosphates 2 days ago, before you started using PhosGurd?
The recommended amount to drop per day is 0.5 ppm max, but I would try to go slower - more towards 0.2-0.3 per day.
You can adjust the rate by increasing/reducing the amount of media accordingly.