Ca reactor and pH question

This may be an easy question but im just a little confused about it...
In a Ca reactor, the CO2 is introduced to lower the pH so that the reverse calcification reaction takes place. So when the now Ca rich water comes out of the reactor, the pH is acidic (about 4-5). When it enters back into the tank wouldnt it slowly lower the pH of the entire tank over time?
what effect does this have on the dkh? i would assume it would constantly lower it because of the constant increase in Ca?

 

....

 

Yeah, that's pretty much how it works.

Now the ph really won't drop much in the tank, and definitely you won't get lower dkh values because alkalinity is added from the decalcification of the media.

Some brands of reactor are worse than others for the lowering of ph. On thee models, a second chamber is a good idea to make sure all the C02 is used up before the effluent goes into the tank.

If the reactor is efficient at it's use of C02, then there won't be any wasted C02 lowering your tank's ph.

I certainly have had no ph lowering issues from my GEO reactor. That brand is very efficient with it's use of C02.

 

It can lower p.h. Ive seen warnings about that but my calcium reactor gave me the opposite effect, because it raised alkalinity.

 

It shouldn't lower ph. If it does, it isn't a good unit.

Calcium reactors should really be called calcium AND alkalinity reactors.

 

i was under the impression, when the acidic water becomes enriched via the calcium carbonate, its PH returns back to the desired level. You run the return into a sump or skimmer to remove any effluence left over.

edit: just to add, if set up properly im sure you already know, a calcium reactor creates immensly stable water parameters.... perfect for super growth!