I don't believe that moss balls and the pest species of clado are the same thing. I've had pest clado, and it did not have the same growth habit as the "moss ball" type of clado. Who knows, though.
My moss ball is cut in half down the middle to create two little hills for my shrimp to crawl all over. I didnt really care for the unnatural look of a green ball in my tank, but it was a freebie with a plant purchase.