Can you manually fill the BB or do you need to connect them to a reservoir. I like the idea of a stand alone hydro system, but my reservoir is in my veg room and I wouldn't be able to fill the buckets in flower
Yes.... you can manually fill the bubble buckets. See the "Rumpleforeskin Bubble Bucket" how to. They have a drain valve built in to them and the drain valve will save you once the plant gets too big and heavy to pull out of the bucket to change water etc.