C02 scrubber question

 
My tank is only 45g display, 15 gl sump. And there’s 2 sizes of air pumps Or is that just the size that’ll push through the scrubber?
 
What's your pH avg. You have the profile right? This is the tank that is mainly softies correct? Curious to see where the pH sits.
 
What's your pH avg. You have the profile right? This is the tank that is mainly softies correct? Curious to see where the pH sits.
My ph is 7.95 - 8.12…stays around 7.9-8.0. I run an Airpump …1 tube to the outside and the other to the stone in the sump….24 hour run. I’d like to kinda get it to 8.2-8.3. Steady
It’s mainly softies….a couple sps
 
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