Planted Tank Obsessed
Join Date: Mar 2009
Location: Los Angeles, Ca
Just keep it in the dark and it should be fine.
I have a 500ml Bottle of CSM+b that I keep in the dark in a White SeaChem bottle. I have never had a problem with fungus growing, I mix a new batch every two months or so.
I keep my weekly dose in a green some what see through bottle next to my tank, After a week, this bottle starts to grow white fungus in it.