[titus]

Hello Reefmaster,

I'm sure you are referring to bubble per minute, right? Afterall, 4bps = 240bpm!

I'd say each setup would have a different tune it time, depending on the system and the experience of the user. Further, it also depends on how fine the needle valve you have as well. Sometimes dpm and bpm change over time at the initial setup.

Yes your tank pH may dip at the beginning. However, once your dkH is up, your pH would stabilize.

BTW, how much you paid for it?

Titus