RMS18
I keep water chemistry as my hobby
I have been experiencing high PH for about 4+ months and I can't figure out why. I wouldn't be concerned with 8.3-8.5 swing but I'm getting to 8.65 at the daily peak.
What I've tried:
I had cyano starting to pop up a few months back and it only got worse. Thinking the PH increases were due to cyano I decided to use chemiclean rather than wait it out this time. Fast forward 6+ weeks since treating, cyano is fully gone but PH only increases more.
Then I thought my probe was not accurate. So I have some Neptune calibration fluid on hand. I calibrated it, but PH was still high. Then I tested the probe in another set of calibration guild to see if it would read 7 and 10 which it did.
Then I thought maybe the calibration fluid I had was old, bought it a year ago. So I order new fluid from a different site. Calibrated and still same high readings.
Then I thought my tuzne algae reactor return was to close to the probe, so I move it into the return chamber of the sump. Still not change.
Then I thought AA may be causing it, so I stopped doing them. Nothing changed.
I'm only dosing 50ml of 2 part Alk and 40ml of cal per day into 125 total gallons of water.
I do not have any algae issues outside the small normal amounts on a pH or a spot on a rock or two.
The last idea I have is maybe my t5 bulbs which are about 10 months now are old? So I have new bulbs burned in and ready to go into the fixture this weekend. I just feel this is not the issue.
I run a skimmer 24/7, no scrubber. It's a SPS tank with good flow, tank is 3+ years old and I have never moved or changed the power of the PH. I just clean them each week. Surface of the tank water is moving. Overflow continues at it normal 680gph.
pH will hit 8.35 at night and 8.65 during the day. 3 weeks ago my peak was 8.61. I fear it is only increasing more and more which is has when I look back at historical Apex data. Prior to 4+ months ago my daily peak would be 8.3, low would be 8.0 at night for over 2 years.
What am I missing?
What I've tried:
I had cyano starting to pop up a few months back and it only got worse. Thinking the PH increases were due to cyano I decided to use chemiclean rather than wait it out this time. Fast forward 6+ weeks since treating, cyano is fully gone but PH only increases more.
Then I thought my probe was not accurate. So I have some Neptune calibration fluid on hand. I calibrated it, but PH was still high. Then I tested the probe in another set of calibration guild to see if it would read 7 and 10 which it did.
Then I thought maybe the calibration fluid I had was old, bought it a year ago. So I order new fluid from a different site. Calibrated and still same high readings.
Then I thought my tuzne algae reactor return was to close to the probe, so I move it into the return chamber of the sump. Still not change.
Then I thought AA may be causing it, so I stopped doing them. Nothing changed.
I'm only dosing 50ml of 2 part Alk and 40ml of cal per day into 125 total gallons of water.
I do not have any algae issues outside the small normal amounts on a pH or a spot on a rock or two.
The last idea I have is maybe my t5 bulbs which are about 10 months now are old? So I have new bulbs burned in and ready to go into the fixture this weekend. I just feel this is not the issue.
I run a skimmer 24/7, no scrubber. It's a SPS tank with good flow, tank is 3+ years old and I have never moved or changed the power of the PH. I just clean them each week. Surface of the tank water is moving. Overflow continues at it normal 680gph.
pH will hit 8.35 at night and 8.65 during the day. 3 weeks ago my peak was 8.61. I fear it is only increasing more and more which is has when I look back at historical Apex data. Prior to 4+ months ago my daily peak would be 8.3, low would be 8.0 at night for over 2 years.
What am I missing?
