Chasing PH

[XavierZ06]

Used to work from home and have the windows open all day, PH was 8.15 - 8.4. Took a job in an office so windows closed all day, now PH doesn't hit 8.0 on a good day.

I bought a CO2 reactor and ran an outside air line for my skimmer, neither have much of an effect (.05 increase max).

Have a fuge running opposite light schedule and that doesn't do a thing either.

Kalk helps some but I can't dose enough to bump PH without exceeding my alk intake and spiking.

Any ideas on what to pursue next? Was thinking flip the fudge for an algae scrubber maybe, but other than that I'm lost.

 

[shwareefer]

Window mounted air exchanger. I haven't done it, but there's a few out there and I think it should work.

An example:

http://www.purifresh.com/erv.html