Okay so your in soil then not coco so feed as you are budI mean I usually go 4 days with out feeding
The Ultimate Potting Mix for the Professional Grower | CANNA Australia
This is the exact stuff I have may be more incitful than I am! This is moss etc in it so it holds water 1000x better than normal soil, hence it being so moist even after a few days I guess.
My room is actually pretty similar to that picture you sent which is really helpful haha so I'll have a read into that and let you know how I get on.
Once again thanks for the help!
Peace
My bad