Dolomite p/h balance for Epiphytes?

[SirCatofBloominCheshireC:]

Do you think its more helpful or more detrimental for an epiphyte Laelia or Cattleya to add Dolomite lime pellets to the bark mix to even out the p/H? I read that orchids grow stronger with an even p/H level. How much of the dolomite pellets would you add? I have a Paph Sanderianum cross I am going to be adding the dolomite to once I repot it into a clear pot with orchiata bark to observe the humidity and root growth. Though I know the Paph is more of a ground grower, often growing on limestone.