i have been buying rodi
from an lfs
. i decided to test water after my salt mix but before adding to tank. all # ok but nitrite was .25(1st shade of purple on api test scale) added prime then later amquel still not 0. tested the rodi
w/o salt mix also .25. i tested water in 2 diff tanks and poland spring distilled all at 0 nitrite. also i did tds
test on rodi
and read 185. tap was 220 and distilled 0. tdi tester appears accurate. is it possible/likely that lfs rodi
is junk? is adding water to tanks with .25 nitrite dangerous? i believe i have been topping off my tank evap w/this stuff and never noticed an issue.