With the alk
at 3 mEq/l it is more than possible that the ph
is fine, it is more or less the CA
that is in question. The ones you should get checked at the LFS
to be sure your own readings and test kits are accurate.
If all ring true, then raising the alk
via buffer will be the best route as long as it is done very slowly
. I would suggest posting the numbers once re-tested to be sure though...
, having the LFS
test the ph
will not help. Once removed from the tank, ph
is affected by ambient O2
therefore any travel time will skew the results making it inaccurate. It must be done within a few minutes of removing the sample...