In Hydrotons and only watering 2 times a day? Hydrotons are usually used with a drip system or flood system that is timed to have several cycles through the day. The leaf tip burn you see is possibily from feeding a strong solution, maybe try a weaker solution more often. Looks like you could use a little calcium or mag. also.
They look hungry.
It is on a timer to flood the top container. I have been getting mixed answers though on how to get her healthy again. Some people say that the nutrients are too high, others say that they are too low. I weakend then strength the other morning and I notice that more of the leafs are getting brown tips and curling. Also I notice some of the leafs are getting light in color however the veins are green. I did add espon salt to the res originally to add some mag. I am at a loss on what to do. Should I empty the res completely and just run a day or two with plain water?