jamal December 23, 2007 Share December 23, 2007 i have been fighting low ph issues but now i am not so sure its the water. i put some fresh ro water in a container and put the probe in and it read 9.38. that doesnt sound right. then i added salt and it kept going down and is currently at 7.87. the water is at 1.028 sg. when i added my ca and alk for the day earlier the ph went from 7.8 to 7.49 which i heard someone say cant be right. probe error? sps are showing polyps and seem unaffected. alk is 9.5 ca is 440ppm Link to comment Share on other sites More sharing options...
quazi December 23, 2007 Share December 23, 2007 Have you calibrated it? If it calibarates correctly, I would trust it. How old is the probe? I change them every 1-2 years. Have you cleaned it regularly? Link to comment Share on other sites More sharing options...
lancer99 December 23, 2007 Share December 23, 2007 Jamal, freshly-mixed saltwater typically has a low pH, even if you are using aeration, so no worries there. It will up in your tank. And you can ignore the pH readings on R/O water...due to the paucity of ions (sounds like a good indie band name!), any tiny contaminants will give you wacky pH readings. Not sure if you are running a Ca reactor...if so, 7.8 is typical. 7.49 is a bit worrisome though.... HTH, -R Link to comment Share on other sites More sharing options...
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