ph is creeping higher

[pantinor]

I have a problem I think were my PH is creeping higher. The pinpoint monitor says 8.7 during the day. It has slowly been creeping higher to this point over the last 2 weeks. I use a calc reactor with co2 addition.

My calc levels seem high at 500ppm but I dont think I have a good measurement for this (red sea kit).

Temp is 79-80.

alk is 9.6 9.7 dkh.

I tried raising the CO2 bubble rate to bring down the ph but not working well.

Any ideas on how to lower my ph to a steady 8.5?

The calculator at this URL doesnt seem to work either, ie nothing happens when I click the button and I have the values entered.
http://www.kademani.com/reefchem.htm

I saw the advanced aquarist article here http://www.advancedaquarist.com/issues/may2002/chem.htm

and here http://www.advancedaquarist.com/issues/ ... 2/chem.htm

but still not sure what to do?

Thanks for ideas.

 

[randy holmes-farley]

Are you using a CaCO3/CO2 reactor? Any high pH additives?

If you're not using limewater or a high pH two part additive (or washing soda), the pH is probably not really that high.

You might check the pH meter in borax:

http://web.archive.org/web/200210150054 ... efault.asp