Calcium reactor help pls

[rumen]

So this is my first go with a calcium reactor ... i hook it up and everything was fine for 2 week then my ph in the reactor drop to 5.6 so i turn the co2 off all day and it went up to 6.5 so i kept the co2 off but let the reactor run for another day and it reach to 6.7 so i turn the c02 on at 1 bubble per 10 sec drips rate 40-50 drop a minute and ph drop again to 6.0 so i just turn the c02 off but still let the reactor running its been a week now and the ph is at 6.6 i calibrate the ph probe twice already in a week and the reading is good on apex .. so what im i doing wrong pls help

My tank info
80 gallon
30gallon sump
Alk 8.5
Cal 460
Mag 1350
Nitrate 0
Phos .05
Salinty .25
Calrx geo 618
Aquarium plant carbon doser
Now manual dosing me coral 2 part
Acro power
Potassium
Swc skimmer 120
Tunzi ato
Ati 6 bulb 39w with rapidled light strips
I run a refugium with cheato and dragon breath and mangrove
I feed twice a day and dose rotifers and copepods once every two weeks

 

[Oceansize]

http://reefkeeping.com/issues/2002-05/sh/feature/index.htm

Scroll down to the part about tuning, and just below that, the part about troubleshooting. Perhaps the problem is you're only adjusting the CO2 flow rate and not adjusting the effluent rate at the same time?

 

[rumen]

http://reefkeeping.com/issues/2002-05/sh/feature/index.htm

Scroll down to the part about tuning, and just below that, the part about troubleshooting. Perhaps the problem is you're only adjusting the CO2 flow rate and not adjusting the effluent rate at the same time?

Thank you for your response. .. i think that could be the problem i will try to adjust both now i usually just adjust the c02 but the the drip rate...