Phal - issues with fertilizer, pots, and environment, mainly - just issues...

[Dollythehun]

Another thought, after seeing your picture, is that there are very attractive plant lights available. I see from your location that winters can be dreary and you may want to suppliment. You can clip one to your cube or they are free standing, as your plants do look a little dark green ( in my opinion). A quick search on Amazon will turn up lots. (And thanks for doing the Walk). Also, to up the humidity, you can add a low light leafy plant, like a pothos, which will give off some moisture (although Phals aren't very fussy).