A root bound 6"x6" square pot that grew solid with an unknown Vallisneria species, probably spiralis.  It needs to be divided and replanted when you get it home. This species grows FAST in my hard water under LED shop lights without any supplements, so it couldn't be much easier to grow. Snails are guaranteed to be included, Chilatherina fasciata - Clearwater Creek eggs are very likely.  Wait 7-10 days and you may have a school of Rainbowfish too.