I've used plain baking soda in the wash and pre-wash containers. In the rinse aid section, fill with plain vinegar. I always use vinegar as a rinse agent to remove detergent residue, plus to inhibit mold growth.
I have had great results with oxy-powders. In fact, the oxy powders cleaned better than any powder detergent I've used. Unlike chlorine bleach, oxy bleach is a safe product. Use just like you would any dishwasher detergent.
Hope this helps!