so your saying i will probably not need any dry ferts, if i have the root tabs?
i want to get some kind of carpet plant for the right hand for front
With the plants you have now you should be okay with just root tabs. If you get a carpet plant like Lilaeopsis mauritiana you will need CSM+B. Ferts you can probably get cheaper at aquarium
I typical spray paint my backs before filling them up. Or get some adhesive backed vinyl from a sign maker and stick that on. I've heard of people using window tinting as well.
I use fabric. I just tape on the back with Gorilla tape. It is cheap, versital and there are many options. I think a blue background would make the wood pop out.