My wife and I had a great lunch on the water today - almost 80°, and sunny - I was in such a good mood I thought I'd chop a couple of bucks off bottles of Kelpak. Sale runs through Saturday, any other coupons, volume discounts, and free shipping to US addresses still apply.
Room temp is fine. The current inventory has an expiration date of 22 November 2024, so if you think you won't use it before then (~67 gallons of solution), go ahead and refrigerate.