Chronic low PH and inconsistent ALK

[Myka]

You've been given lots of great advice. If you don't run through an effluent chamber it is not likely that you will be able to raise the pH. Fresh air might help a bit, but probably not much according to your outdoor testing. I also agree though that pH 7.9 isn't a big deal. I don't think your salt has anything to do with it either. Try an effluent chamber.

Could you expand on "my ALK drops out"? What number does it go from and to? How long does it take to change?

[PFoster]

I think he just means that his alk readings are the ones that suddenly decrease.

What type of CARX are you using?
A single stage or dual stage?



You can also add media to the second stage of your reactor to moost your mag output.


I dont think it has anything to do with your salt either.

[waynemah]

Originally Posted by Myka

Could you expand on "my ALK drops out"? What number does it go from and to? How long does it take to change?

The first time around it dropped from 11 - 6.5 within a few days. Initially I thought this was from a phosphate remover, but more likely from the tanks cycle?

The 2nd time was this past week, I've had my ALK drop from 10 - 5 within a month. This drop was more gradual at the beginning (10 - 9 - 7 then 5). I was hoping it would just balance out at 7, but it dropped below.


This is all VERY good advice (Thanks!!! ), I just want to understand it a little better. As I read, PH is critical to the growth of corals and I want to get the best results possible. I believe my aeration tests were poor due to the change in temperature and likely my issue is an excess of C02.

I'm running the Reef Octopus reactor, it has a single chamber. Anyone know of a good *mod* to add another chamber? Could I use a TLF reactor or something?

Wes, when you ran your line outside of the house how does this work in the winter? Does your skimmer freeze up or anything? I'm 100% ok trying this, what size of tube did you use?

Has anyone tried to resolve a similar issue with an HRV / ERV? What is the added cost per month for one of these units? If I have a C02 issue in my house, spending a little money to improve the health of everything living in it is worth the investment.

Thanks for your help everyone!