Was it worth it? Treating Ich... ?

[yachtdr22]

HELP! MAJOR BUMMER;
No ICH was visible after 1 week of 1.009.
4 weeks later and hoping to start back up the salinity scale and POOF.. Its Back!!
I Have been changing the filter daily.

Anyone have any input on Kent Rx-P ?? Some was given to me when I bought a tank and the label reads like it should work?

input?

thanks
Drew