ok then do the buffer thing and dont do a water change till its time of the month.
i have one of those buffers things. never used it
its still closed. and i bought it 3-4 months ago lol.
i have the kent marine superbffer-dKH
it says to dissolve one teaspoon of kent marine in RO water.
add directly to tank or sump for each 20-30gallons of tank capacity each day until the desired PH and alk is reached.
wait 1 hour to re-measure alk and wait 24 hours to re-measure ph levels. (full ph levels increase and stabiliztion may take up to 48 hours)
after target ph and alk are reached, use at 2 weeks intervals to maintain values.
( i will do what it says.) what do you do?
HTH