Thank you all for your feedback. I ended up getting a Black Mystery and an Inca Gold snail.
I went to two stores, neither carried ramshorn or trumpet snails. My daughter was with me and she saw the Inca Gold and so we bought it for the live plant 5 gallon tank. I then decided to buy java moss on a coconut and the Black Mystery snail for the 10 gallon tank. That was the tank set-up in the store.
I rinsed the java moss on coconut in cold water for about 5 minutes. Well... and now the tank has also two or three baby black mystery snails. I don't know how many or if any went down the drain.
Hope it takes them a while to get too big for these tanks. However, I have another 10 gallon and a 30 gallon tank sitting in the garage... so once the other tanks get too small, I will set up the big tank.
My husband is going to freak out when I set up another tank, but when you are hooked, your hooked....