Welcome to FishLore!
Your PH is only 7.6 and that is not high. Matter of fact it is fine and has nothing to do with cloudy water. Some
LFS stores, they just amaze me.
Cloudy water means a "bacteria bloom". It's comes with setting up a new tank even if it's a used tank. It can appear a few days after tank setup or a few weeks later. Over time it will clear itself when the tank starts to grow the good bacteria, has good filtering and becomes balanced.
You also need to get your own
test kit;
API Freshwater Master Test kit. Tests for
ammonia,
nitrite and
nitrate. Do you know how you are going to cycle the tank?
If it was me I would of bought brand new gravel.
Just a note, in your "aquarium age" you should put the
date the tank was setup. Makes it easier for members to know exactly how long the tank has been setup, then you wont have to keep changing it or forget to change it and your tank is really 6-weeks old instread of 3.
