Recently encountered my rowaphos in my tlf phosban reactor changed color, from black to greyish blue. Only thing I did was using zeobak and coral vitalizer from korallen zucht. More likely zeobak the culprit cos I am not running the full zeovit system ie no zeovit reactor, no zeolite stones. Juz this question to ask, after it changed color, can the rowaphos still be used? Currently still running in my fr. I tried 3 times and usually after 1 wk of dosing zeobak, the color will changed. I only dosed 1 drop per wk due to its potency, mine is 50 gallon tank. So after 2nd drop a wk ltr, rowa will changed color. So far nv see any impact on my LS. Juz worry in the long run and that my rowaphos not effective in the fr.
Anyone encounters this before, pls advise.