Crypt Blassii Crypts bring a great contrast to your planted tank. Crypt Blassii is no exception to that. The dark leaves of Cryptocoryne Blassii can be a great accent to the fore ground of any planted aquarium. This Crypt comes from Thailand and is grows both above and below the waterline. It obviously can handle being under the water 100% of the time. I had been only putting these out in combo packages but figured I'd like to share them more... I got them in about a week ago and put them in my dirted 125 and they didn't melt. That's not to say that they won't but certainly a tad hardier than some other crypts I have messed with.