We are using laundry greywater for veggies and trees. We should perhaps build a filter like mentioned in another thread, but first we should avoid the false laundry powders. I read that sodium an phosphate are the ingredients which are bad for the soil. With phosphate it is simple because it is marked on the box, but how do I find out the sodium level?Are there sheets with brands and ingredients? Is sodium (cooking salt?) necessary for laundry and are there powders without sodium? Or should we all write to our supermarkets demanding what is in the laundry powder?