Hey there... I just popped back in to see what other growers are suggesting for you and saw your comment... unfortunately, even if you tag someone on this page, it won't alert anyone that you've made a comment or tagged them....
There has to be a way to lower your pH, there is no water that CAN'T be lowered so I don't know what you've tried in the past that you say you can't lower it. If the issue is your tap water, then try using Spring Water - I've found that it takes FAR less pH-Down to reduce the pH of that... Normally, for MY tap water, I have to add about 30 drops of pH-Down in one gallon before the needle starts moving... so if you've tried pH-Down, then you need to increase the amount you're adding to your water... And it might take MANY gallons of water to finally bring the pH down to acceptable levels in your soil... and then it's fairly easy to maintain that level if you make sure everything you give her (water/nutes) is ph'd properly.
Please feel free to DM me ... that's the little paper airplane in the bottom right hand corner or you can go to my profile and just click "chat" ....