ph level too high

Hi,

My plants are about a month old and they're starting to wilt. I think it's the PH level. I don't know about the soil, but the water is at 7.4 - way too high, I know. What's a quick fix? Anything I can add to the water/soil?

Not sure on soil bro. but I do know that optimal levels for hydro are 5.6 to 6.2