I am giving myself one post point for reading this entire thread!
It was getting ugly. I think...almost makes me want to quit. Someday I am going to come home and see the $10K investment sitting in my living room all curled up and dead...why...because remember guys...90% of us (read my sig) have no idea what is going on in our DSBs. I know I tested for PO4...got zero...I am done. I guess ignorance is bliss...at least it sounds like I have 3-5 years to figure out what I am doing...maybe by then there will be a little stick you can poke in your sand bed and it will tell you how much time you have left. You guys are smart...invent that.