35 °C is too warm...and likely is affecting the temperature of your solution...if the water in your tank is too warm...its oxygen deprived...if the water is oxygen deprived...the roots aren't all that happy. When the roots aren't all that happy...you'll begin seeing more and more deficient growth. As well as pH and total disolved solids (tds) are two major concerns when doing a hydro grow.

I suggest you hop over to the hydroponic forum and see if anyone there can help. I'm only recently heading to hydro and don't have it in me yet to pinpoint a determination rom pictures.

Alls I can tell ya...if your grow solution isn't right...margins of error aside, your plants won't be right.