Maybe ask Fred. I just gave most of it to a friend that wanted some. The cuttings from off the slate tend to be rather short, if i keep up with the pruning. I do have some in a brackish water tank. What I call brackish anyway, SG 1.001- 1.002 and I hope to grow it out. It did better then I would have thought, until recently. The other plants have grown in and are competing for CO2. The stuff attached to the wood died back. If what I have left does better on the surface I can do something then. But, worry about it growing in brackish water. If I should even call water with a SG of 1.002 brackish.