I make my own detergent and there is no phosphate in it. There are several recipes for laundry detergents online. Very inexpensive to make. Cost me less than 6 cents per load to make. One batch last me about 18 months. But there is only 2 of us. I am sure you could use just about any detergent that has the basics I would be concerned about the fragrances that are added to many detergents or fabric softeners that some include now.