PH question

[adidas]

Had my water tested at big al's and he said my ph is at 7.7, tested it at home and it says its right around 8.4. Wouldn't there be some adverse effects in my tank if the ph dropped? I ask this because all my corals are happier then they ever were right now, my fish, inverts are thriving.

only problem is a little bit of Algae but we havent been keeping up with cleaning of powerheads and filters and the glass.

what do you guys think?