Something is still devouring my KH levels

[Deliverme314]

I need to add baking soda religously to keep them where they should be... If I dont they will hit zero in no time and then my PH crashes. Had it hit 5.0 again today when it was 6.7 last night... any ideas what could be doing this? Just in general and maybe it will lead me in a direction I havent been....

 

[Spy_90]

thouse kits that "set the ph" are full of buffers. you might one of thouse.
they have a veriety of kits to "set" the PH. just pick one that you like and give it a shot. that's what i would try next anyway =/
good luck!

 

[Deliverme314]

No good... Its a planted tank and have to have an accurate reading of my dissolved Co2 level. PH buffers invalidate any readings. The only buffers that dot are carbonate buffers... i.e. Baking soda...