why are my leaves going yellow (moth orchid)

[fortis]

Hello Fortunatas, I see you are using spagnum moss for your planting medium. I do not have good luck whenusing sphagnum moss. The roots of my plants rot because the spagnum stays too wet for me. The roots of your phal look good around the edge of the pot. What do the roots in the middle of the sphag look like? What amount of light do your phals get each day?

Yes, cindiras, there are two plants that grow in spagnum moss. I am not satisfied with it totally to tell the truth but unfortunately it is impossible to get orchids in another medium down here. Yesterday I bought bark and going to repot them separately. The phals are on south-east side window but there is no much sun these days in this part of Europe. The roots in the middle of one of the plants are not looking very well as I can see signs of rot and some "fur". Though I was careful not to overwater the plants however spagnum moss was keeping too much wet and there were not so much sun these days. This forum is a real help! Thanks a lot!

[fortis]

Just separated and repotted phals. One was definitely suffering overwater, however another one looks healthy. Rinsed both in HP and put in bark medium. Cut down spikes: to the base of the one that has rotted roots and another just a little above the second. Have another almost dried phal, so I'll try "water culture" with this one. That's my work 4 today. Wish me luck to revive them