constant drop of pH

[Bill3296]

I'm running a 90 gal Reef tank with fish ( 4 ) & several corals ( 1 1/2 years ) . I use a cal. reactor to deliver my make up water . I see a constant drop in pH .( I use a sump / refugium filteration ) .In some cases the reactor drives to much calcium such that it comes out of solution .What is the correct way to balance my calcium & buffer / pH?

[three90s&125sump]

What is the pH of your effluent?

[crvz]

Well, I have a lot of questions with your above post. First, I assume you're running a kalkwasser reactor on make-up (a.k.a., top-off) water. A calcium reactor usually has tank water flowing through it. Please confirm this.

Second, how are you measuring pH, what is the normal range, and why do you care about it? It's not a simple thing to get an precise, accurate measure of pH, and it's seldom important to try to control pH. I think it's more important right now to ensure you stop overdosing kalkwasser (as I'm assuming that's what's going on) and stop thinking about pH.

[three90s&125sump]

Now that I have reread that I think that, too.