Selcon belongs in the fridge, but I think the Nori is fine in the cabinet inside of a Ziplock. It was dried, so keeping it dry is the ticket, imo. The moisture in the air tends to turn into condensate in a chilled environement. I use two bags, one for storage and one that I refill with 5-10 sheets at a time and that I will open and closes everytime I feed. Trying to keep the air exposure limited to the product over its lifetime.
oh, and I wouldn't wet the Nori with Selcon and then put it back in the bag for future feeding. Wet and feed the same day.
The Nori you purchased looks fine. I buy "sushi" nori and try to avoid flavored or salted, or other "additives" beyond seaweed. Dried, can be sun dried or oven baked, I like sun dried myself. Seems softer and may be easier for the fish to chew?
Question so right now it is disintegrating a little bit since i cant zip all the way correctly unless I spend like 5' on it, could i cut it in small pieces and store in another empty fish pellets container?
I've never refrigerated Selcon or nori -- no problems but never really thought about it.
Selcon, I just shake and put about 3 drops on flake and let soak for maybe 5 minutes,,, then dump in the tank.
It does give off a brief cloud in the tank but goes away fast and doesn't affect tank parameters (per their advertising and what I've observed).
For nori, I think raw is probably better than roasted but I've just been using cheap, roasted, sushi nori from Amazon.