Well water is just fine, but IMO, regardless of the style you use, you should have your water tested to know what dissolved solids you already have naturally. GH for example at full strength is so far into the toxic range, and even still with a 30% reduction it's still toxic, but manageable. Well if using unfiltered water, it would likely elevate the calcium and magnesium back up into severely toxic ranges, but if you knew in advance what those levels in your water were, you might could adjust the feed with that in mind. The way I'm going you most definitely could adjust to account, but maybe not so much with liquid nutes. The good thing about Hydro Buddy is that you can create "custom solutions" which means you can label your well water as a custom solution and just input your water analysis report values into the app for storage and always include it in with your mixtures. HB will keep your presets in mind and still try to resolve all of the other solutions to get as close to your targets as possible. I admit, that does sound complex, and in reality, doing things that way is complex, but if you don't want to filter your water, that choice would itself add a complication to the process, so the added burden would be felt somewhere along the line.
