hahahaha! yeah, it doesn't always show my name on certain apps. as far as ferns, small ones are very difficult to get right now. it's like over the summer, everyone wanted to add small ferns to their tanks. lol you have a lot of height in those tanks, but not much else. most ferns would fill up your floor space rather quickly. but i will get you some links tomorrow to check out. moss is also a toughie. i'm always on the lookout for alternate suppliers of moss. i have never used Josh's moss, and have heard mixed reviews on it. there are a lot of online garden moss sellers around, but they have mostly temperate mosses.
Moss For Sale Online stocks what they call "terrarium moss", but i haven't tried it yet, so i can't vouch for it's quality. believe it or not, i picked up some cheapie sheet moss from Petco, of all places, and it has been growing very well for me. who would have thought? lol Terrarium suppliers also have excellent moss. it is normally tropical so it can withstand a sealed terrarium. and it is normally cheaper than a reptile seller. garden centers with terrarium sections are also a great place to find good sheet moss.