MAAROOF, A. A.; SHARIF, F. M. Study the Changes in (pH, Turbidity, Hardness, and Total Organic Carbon) Levels of Water using Plant Membrane (Palm Leaves Powder) and Aquatic Plant System (Vine Stems). ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, v. 7, n. 1, p. 5-12, 1 May 2019.