P04 making corals unhappy

[NIVLEM09]

Using the Hanna high range p04 checker,it read 12 ppm.unfortunately,i only have an API D/I unit not an RO/DI and the source of p04 is THE D/I unit.so,i ordered an RO/DI unit and GFO high capacity from BRS just now.i've had to put my sps corals in my brother' tank til the problem is resolved...i don't wanna lose my corals and especially my beloved Ice fire echinata!thanks guys.