P04 making corals unhappy

[NIVLEM09]

As per the title:i have HA and valonia in my system but when i test the water for P04/N03(API test kit) it reads ZERO.so i decided to purchase a Hanna P04 test kit 4 days and my phosphate is thru the roof...i don't have any fish in my tank and i just dose Zeovit Pohl's xtra every day,sponge power and coral vitalizer 2x per week.so,i went to j&L yesterday and got some Chaeto and another TLF reactor/rowaphos to help lower the excess nutrients.i've had to put buying SPS and LPS on hold til my tank recovers.not really sure if it's my LR leeching P04 or it's coming from the D/I filter?suggestions?