shell

Hiii So I bought a mystery snail from Petsmart about 3 weeks ago. He wasn't very blue. His shell was flaky and yellow-ish. Well after about a week and a half of cruising my tank (10 gal with betta, 4 ghost shrimp and 2 other Nerite snails and plants) he's started to grow what looks like new...

I just got this new giant shell and I think it looks super cool, what do you think? It is in a ten gallon with one of my bettas, ghost shrimp, mollies, and one sword tail. Look at my aquariums and tell me what you guys think of them?