So i have a bubbleponics system that is holding three plants. Everything has been going good and they been growing very well. However today i went to check them out and i noticed that the entire leaf of just the one plant have started to turn over and was almost upside down. I also noticed that the tips have started to turn in on the others. So i raised my light because i was thinking it was to close. I come back later and 2 more leaves are starting to flip over. so i replaced 2 gallons of the water with fresh to see if that would help. Is this the right thing to do? or is something els causing this?