Ouch. I had mine spike recently after killing off all my algae with reef flux. Ironically it was mostly under control at 0.3 ppm but I started dosing lanthanum chloride which killed my zebra dart gobies who died in the rock work, spiking me up to 0.7 ppm. I'm finally back to 0.12 after adding some GFO.Checked my phosphates this morning..... they were 1.2 ppm
Got the reactor hooked up and pumping through some GFO now. I figured they would be high due to the move and die off/live rock movement