Had a problem with the float valve, it got plugged with gunk and it was not letting water go down to the main reservoir.
The plants had no water for 3 days and all the leaves were wilted, then I found the problem and filled the main reservoir.
Two plants were so bad that they died, but the others recovered somewhat.
We had to harvest those two plants early because they were burning up.
Still have 5 plants going but we lost a lot of yield because of this.