Just use our local water, hard as!
Softer water will foam more, as will desalination water or 'soft' water.
Usually though, any cheap brand dish washer water will not produce much foam, causing you to use more of it. (Maybe a smaller amount squirted of your normml stuff wiill also help)
We use a good quality detergent and previously when using an inbuilt water softener,we have had to premix the detergent into another bottle mixed with water to tone it down a bit. (In case your still heavy handed)