I mean to say that 15ppb is equiv. to 0.05ppm PO4, not 0.03ppm.Well here's a weird one for you guys...
I dosed my tank Saturday and today the bryopsis is mostly gone. What's left is white. That's not the weird part...
I just tested my phosphate (hanna ULR Phosphorous) and it is zero ppb phosphorous. I've tested it three times. All zero ppb. My phosphorous was 15ppb (0.03ppm PO4) on Friday... I will say that I have a ball of chaeto spinning in the refugium under a red grow light 24/7 and it has grown quickly, but ZERO ppb phosphorous?? What the heck...