Welcome to the forum =) Another wow player I see.. or former.. or just a fan of Leeeeroooy! =P
It's hard to tell with your AV pic.. the only thing I am wondering about the tail curling is if it is actually fin melt. Does it look like the 1st and 3rd pic on this thread? Member fin melt
If so then you will need to take care of it.. if you see that he can spread it, he is just clamping it some.. then stress coat+ will help him open up. And in time that will happen.. my blue VT was like that when I first got him, now he spreads it out all the time.
As for water changes.. a 2 gal unfiltered you would want to do a 1 50% and 1 100% water change per week. You don't really want to do more then that, having too clean of water will hamper him from getting the proper bacterias and such that will benefit him. Sometimes it can be too clean. A 2 gal is a good home for him, with a mini heater and deco, he can live happily for years in that. Can use a lower watt lamp to light it up. I only say that because some of those changing colored lights aren't worth it.. can stress them out with the moving colors, and the "clear/white" is actually dim (from my experience with them).
Want pics! =)