I have built myself two PVC aeration devices that I attached to a 1/4 HP submersible pump I got from Home Depot a while back. It has a 1 1/4" male thread, on which I put a piece of female threaded pvc and then stuck a straight piece of 1 1/4" PVC up into the air. The first style is simply capped off with holes drilled into it to make a shower head style sprayer. It shoots water very far in the air and splashes everywhere. It worked to raise my pH, but I was losing too much water for my taste through evap and splashing. So I built a T on top of the PVC that spreads the water out 12" on each side and has 1/4" holes drilled in it to shoot the water directly down. In my opinion, I'm disturbing the water much more this way, but I'm not seeing the pH rise that I did with the previous setup.
So, what's the best way to get a fast pH rise? I'm working my TA down from 175 to hopefully 60 or so. I've been working on it since Sunday and I'm only down to about 125 as of 7am this morning. I'm anxious to get home from work and test it. I'm worried it won't be much beyond 7.4 from the 7.0 I left it at, but we'll see.
Also, if the goal is to put air into the water, would it be crazy to use a shop vac in reverse for this job instead?