I would think so, by small jugs, I use 5 litre bottles. I had my 30gal tub outside also producing phyto but it made no sense to me to try and keep that much phyto alive and waste my fertilizer as I will never use that much phyto. That and if you have a few smaller jugs, if one of them should die then you have not lost your culture and can make more. In a large tub or tank, if it dies, you have nothing and then have to go chase down Jason and beg him for some more...lol (just joking).
Chuck