I agree with Reeferntraining, Red Sea Coral Pro salt would be good for you. It's supposed to mix at 11dKh. I like the Red Sea Coral Pro salt. I may at some point try the Tropic Marin salt, but I do not think that would help you raise the dKh, as it's a lower dKh. BRS tested several salts and said the Tropic Marin was the cleanest.