Lanthanum
i recently ran out of lanthanum. I had a 1L bottle bought from bunnings some time ago so went and bought the same again today. I looked over the bottle to ensure that it wasn't different, with no other additives etc. when I opened it I was mildly surprised to see that instead of the clear/whitish liquid of before, it is now a "Blue Hawaii" blue. Should I be concerned? There is nothing on the bottle that says what the colouring is. I added a small amount to the tank earlier and it's not causing any issues in a small dose. Just a point of interest in using non-tank specific chemicals.