Soiless PH 5.8 or 6.5

As the title says is Soilless mixes meant to be kept at what optimal level. 5.8 or 6.5??

I am running into some problems with my current grow. I am sure is a Ph lockout due to high levels. Water in 6.5 and runoff is 6.9. The dolomite i added is keeping it fixed around 7.

I understand this is high for but thought after a few waterings it would come down. I made the mix myself consisting of 50%peat 30% perlite and 20% vercimilite. I read online the ph should be kept like soil but i am thinking now it should be kept at 5.8 like hydro.

The 7 plants are fucked. I did manage to take 20 clones and are in straight perlite at the moment. I just want to confirm what PH i should keep them at before i put them in their pots. Really confused as there is a lot of conflicting info online. Seems people are running both but they cant both be right.And if 1 is wrong why arent they running into these problems too?

Hydroponic medium should be between 5.8 to 6.4, ensure next time you let the mixture sit in water adjusted to 5.8 to 6.4 for perhaps a day or so to ensure you don't run into this problem you can do the same for soilless mixture

So peat is run like Hydro? 5.8 being optimal?

If so its the dolomite messing me up. I will just leave it out next time