My new pool pump has a high PSI and bubbles are in the water. How can I repair it?
2 hp is WAY too big for that system. That looks like a 90 sq ft cartridge filter (C-900) which can handle up to 90 GPM when clean but that is extreme. 25-30 PSI is probably not out of the "normal" range for 2 hp. You don't say how many gallons the pool is but that should determine the size of the pump. You get far more efficiency and better filtration with a slower flow. General rule of thumb is smaller pump, larger filter. More power is not good when talking about pool pumps. In addition, it looks like your piping is 1 1/2" PVC. You can only force so much water thru that small of a pipe. Think of trying to blow a mouthful of water thru a soda straw. You will encounter pretty substantial resistance. That's a small version of your pool pump...that resistance, called "head pressure" or "friction loss" converts to PSI at the pressure gauge.

The real solution is to downsize the pump. If you don't want to spend the money since this one is new, you can refit it with a smaller impeller, maybe a 1 hp impeller. For a Super Pump (with the square lid) that would be SPX2607C. If it's a round lid, then it's a Super II and would call for an SPX3007C.

PS Air in the system generally lowers pressure, not raises it.