Happy to help. I ordered this kit after confirming 3gpd fixed output was all I needed:
Stenner Acid Feeder Peristaltic Pump with 7.5 Gallon Acid Tank 110V | S7G45MFL1A2S
Then I ordered this connection for the plumbing.
Spears 402 Series PVC Pipe Fitting, Tee, Schedule 40, White, 2" Socket x 1/2" NPT Female
https://www.amazon.com/dp/B009F3JTF...abc_D6GDH43E7N2VNAE9BX5T?_encoding=UTF8&psc=1
I have the iAqualink so I connected the power to a gfi controlled by a relay, so I don’t need a separate timer. The 3gpd models output .27 ounces per minute. So far I’ve run the pump for 2 hours at 1am and my pool is at about the pool builder first 30 day recommendation of 7.2. Today will be the first day to confirm 2 hours a day keeps the PH steady. I cut the 31% Muriatic Acid with water 50/50. Stenner says this isn’t necessary but I will start this way and see how it goes. If did not cut the acid I could run the pump for an hour instead of 2 for the same effect.
I learned all of this here!