hey gooroo, why do canna nutes have to be changed every 5-7 days? i guess this would be ok on a small rez where u need to refill every 5 days or so. maybe im just overthinking this. my veg tent has a 5 gal res and it lasts about that range and my flo tent has about a 20 gal drum which i bet would last about a week as well. maybe i am overthinking it lol but knowing me i tend to get lazy and tired and put things off at times and i might try and drag out rez life as long as possible. ever had any issues with it staying in the 2 week range?