Actually, when looking at that pic of the hydro tub, the problem child would be on the front left corner and there's one right behind it that's just fine. The third plant is on the front right corner and is doing the best. The airstone thing is on the right side of the tub.

I changed out the juice about a week and a half ago. I'll be doing it again this thursday or friday. Depends on when I have the time. According to the instructions I'm supposed to change out the solution every two weeks.

I can go check the temp right now to see what it is, but what temp should the solution be?