Dendrobium spectabile white leaf tips
 

The new growth of Dendrobium spectabile has white leave tips. Pretty healthy otherwise, no bugs. I do believe i don't water it enough. The medium is mixed bark and sponge rock - no moss. I water once a week. I just started watering it twice because of the white leaf tips. Also, i wasn't sure if this is what the normal leaf growth looks like or its a problem. Roots look healthy to me in the clear container it is in.

Once a week probably isn't enough. I would also look for spider mites. Their damage can look like this.

Thank you. I checked for mites, several times but I haven't seen any. The plants around it have no mites damage either, and they have been together for a year or so. If it is because of water, does the color come back? On the other stalk, there are some accordion leaves so that got me thinking it is water.

My guess is that it's a water shortage as well.
Those things want a lot of water and fertilizer now that's it's growing season.

They won't recover from that but new growth should become normal. They like warmth and regular water all year.

Thank you
 

Thank you all.