Best dishwashing detergent for hard water, w no plastics - US

I have very hard water and I’m currently using Finish Rinse Aid in addition to my dishwashing detergent. I’m about out of pods and am looking for opinions on the best detergent to replace the pods. While I realize there is not a ton of plastics in the pods, I have decided to make a conscious effort to replace any products that increase exposure to microplastics, so the plastic-wrapped pods are off my list.

What to you recommend for someone
- with hard water and 20+ yo dishwasher
- open to powder, liquids, and tablets that don’t use plastic but would *prefer* to use powder over liquids
- budget conscious

I look forward to basking in the font of your knowledge!