Abstract: A scale inhibitor includes an amount of hydroxyethylidene diphosphonic acid (HEDP), and an amount of hydroxyapatite. The amounts are combined to form a composition that is long lasting, high activity and completely dissolvable. The composition has a preferred particle size of less than 200 nm. Dicalcium phosphate, tricalcium phosphate, bone and/or bone ash may be used in place of hydroxyapatite.

Abstract: A solid scale inhibitor for use in fracking operations to inhibit scale build up, includes a powdered composition having a salt component and an acid component; the powdered composition is 100% dissolvable; and the acid component increases the dissolution rate associated with the salt component, thereby preventing the salt component from contributing to scaling formation in one or more production lines within a fracking operation. While both the salt and the acid in the present invention inhibit scale formation on their own, the acid (HEDP in the preferred embodiment) dissolves quickly, while the salt (HA in the preferred embodiment) dissolves very slowly; by combining the two, the dissolution rate of the acid is slowed and the dissolution rate of the salt is increased. Thus providing for an effective long term solid scale inhibitor.