zspidel;3955032; said:.............so as long as that stuff worked, it shouldnt have had anything to kill the bacteria correct?
Correct. It shouldnt have died off, but the test results say it has.
Unless your nitrite kit is faulty?
25% changes wont help much. I'd do at least 50%, often enough to keep nitrites as low as poss. And dont feed (or hardly at all). And the easy-fix....add some more mature media, or one of the bacterial filter-aids.