[PDX_Customs]

I was using distilled water to spray off the part over the tanks and then I rinsed more with reguler tap water, could the tap water make that much difference? I have been trying to decide whether to buy a RO machine or not, do you have any suggestions of good cheap ones?

Thanks

Also, if the 720 calculator gives me the wrong amount of time to keep it in how do i tell how long to keep future parts in?