Can I still use my block salt in HarveyArc?

No, the original block salt does not fit the HarveyArc. The mini curved salt is made specifically for the HarveyArc and fits neatly into the salt cavity wrapping around the cylinder case. The curved salt is also lighter and easier to handle than the original block salt. If you have block salt remaining from your previous softener, please contact our salt team on salt@harvey.co.uk to arrange collection.