Asbury
What's in your tank, is it cycled yet?
What are alk (KH) and calcium levels.
Don't start adding buffer or anything yet, I just did and now my readings have gone beserk.
My fish, shrimps, snails, crabs etc have been at 7.7 - 7.8 for over a year now and have been fine. Corals will be different.
Tread carefully at this stage.