F.Banana auto organic selfwatering

The girls are doing fine, they are very easy to look after. I go in, and I admire them! :D They are well into bloom now and a bit less than halfway to go. I did top watered them with 5l nut solution this week. The water tank is empty... I kept it like this so I could see how the R.Gorillas would have it with the tank full. I didn't want to take the risk for all of them. But now that the Gorillas are looking good I'm planning to fill the tank up for the Bananas as well and put one air stone in there as well.