I feed my 90gal tank 2ml of brightwell amino acids daily, thinking of going up to 4ml. Im currently dosing out of the 250ml bottle, which lasts me 3 months but I’d like to go up to the 2L bottle to save money, but that means it’d last 3 years at 2ml per day, or 1.5 years if I double the dosage like I plan to. The Brightwell website mentions issues with keeping the “product fresh” since it’s basically proteins, but doesn’t mention what a lifespan is before it goes bad. Do you think I could dose out of a 2L bottle for 1.5+ years and it stay fresh?