Ph falls below 7

[ReeferChump]

Something that I want to note is that your salinity should be 35, not 30-31 if you’re trying to keep coral. This may also help with pH.

I keep mine at 35 so I’m confident I have a bad test kit

 

[chiefreefofficial]

Man idk what’s going on my PH has dropped out of nowhere. I thought it could be my CO2 scrubber media but I replaced and nothing changed. Over the past 3 days it has dropped from 8.1 down to 7.15 and even read as low as 6.98. I recalibrated my Neptune apex probe and it read correctly at 10 when in the calibration solution. My PH is still sitting at 7.15. I washed a set of my felt filter socks and used detergent and thought maybe that could be it. I replaced those last night and ran carbon all night and still kept seeing a drop. What has changed is that I have added 3 fish to my 120 gallon 3 days ago. There is now a gem tang, Naso, 2 clownfish. The blue hippo didn’t make it after 2 days and wasn’t eating since I got him. My tank cycled a month ago and has been up and running for 3 months. I just turned on my lights about 4 days ago and I am now getting a diatom bloom. I’m honestly at a loss for what could be causing this. So far my tangs look healthy and fine. I have increased feeding to avoid aggression in the past 3 days as well so I went from feeding pellets twice a day to now 1/4 sheet of nori and frozen mysis 2-3 times a day. When I checked my PH probe there was a big chunk of gunk on it but I cleaned that off and recalibrated like I said and still getting an issue.

 

[chiefreefofficial]

Man idk what’s going on my PH has dropped out of nowhere. I thought it could be my CO2 scrubber media but I replaced and nothing changed. Over the past 3 days it has dropped from 8.1 down to 7.15 and even read as low as 6.98. I recalibrated my Neptune apex probe and it read correctly at 10 when in the calibration solution. My PH is still sitting at 7.15. I washed a set of my felt filter socks and used detergent and thought maybe that could be it. I replaced those last night and ran carbon all night and still kept seeing a drop. What has changed is that I have added 3 fish to my 120 gallon 3 days ago. There is now a gem tang, Naso, 2 clownfish. The blue hippo didn’t make it after 2 days and wasn’t eating since I got him. My tank cycled a month ago and has been up and running for 3 months. I just turned on my lights about 4 days ago and I am now getting a diatom bloom. I’m honestly at a loss for what could be causing this. So far my tangs look healthy and fine. I have increased feeding to avoid aggression in the past 3 days as well so I went from feeding pellets twice a day to now 1/4 sheet of nori and frozen mysis 2-3 times a day. When I checked my PH probe there was a big chunk of gunk on it but I cleaned that off and recalibrated like I said and still getting an issue.

Update for anyone experiencing the same thing. Probe had a big piece of mysis or gunk stuck on it. Now so fine and accurate.