Air bubbles

[Benzjm02]

I have a very typical Florida in ground pool with hot tub attached. I am getting air bubbles out of one my in takes back into the pool. When I put my hand over it, the other one in the pool doesn't get bubbles. I checked all Connections at the pump, everything appears to be tight, no water leaks. If I was to screw in a plug into the one that has the bubbles, will it hurt my pool by only having water come back into the other? I think the air may be at the one inlet where the bubble are appearing.

[Teapot]

That's a return, not an inlet? You'll slow the flow a bit, cause worse circulation and maybe put more load on the pump increasing your electric bill.
On the other hand you could fix it? If it's the return fitting, Check out Anderson Frankenplug fitting saver, takes seconds to fit!
https://www.leaktools.com/fitting-saver.html

[Denniswiseman]

I have a very typical Florida in ground pool with hot tub attached. I am getting air bubbles out of one my in takes back into the pool. When I put my hand over it, the other one in the pool doesn't get bubbles. I checked all Connections at the pump, everything appears to be tight, no water leaks. If I was to screw in a plug into the one that has the bubbles, will it hurt my pool by only having water come back into the other? I think the air may be at the one inlet where the bubble are appearing.

You don't normally get air bubbles from a return leak as it's always under pressure. Most air bubbles are caused by a suction side leak
If you aren't losing water does your pH rise

[Teapot]

I have seen one that worked like a Venturi, very unusual