+ACampbell Posted July 31, 2006 Share Posted July 31, 2006 I just tested my pico (6:30pm) and the alkalinity was >300 but my pH was 7.6! How does that happen? How do I fix it? Quote Link to comment Share on other sites More sharing options...
hammondegge Posted July 31, 2006 Share Posted July 31, 2006 300 on what scale? you could dose Kalk. what is calcium? Quote Link to comment Share on other sites More sharing options...
+ACampbell Posted August 1, 2006 Author Share Posted August 1, 2006 alkalinty is 300 ppm. pH is 7.6 calcium is through the roof also; >500 ppm I have not added any additives since I started this several weeks ago. I have som kalk; should I be using it? Quote Link to comment Share on other sites More sharing options...
hammondegge Posted August 1, 2006 Share Posted August 1, 2006 kalk will raise calcium and ph. maybe you should wait for your calcium and alk to fall. perhaps the high calcium is driving down the PH. all three cant be high at the same time right? Quote Link to comment Share on other sites More sharing options...
hammondegge Posted August 1, 2006 Share Posted August 1, 2006 The pH of marine aquarium water is intimately tied to the amount of carbon dioxide dissolved in the water. It is also tied to the alkalinity. In fact, if water is fully aerated (that is, it is in full equilibrium with normal air) then the pH is exactly determined by the carbonate alkalinity The higher the alkalinity, the higher the pH. Figure 1 shows this relationship for seawater equilibrated with normal air (350 ppm carbon dioxide), and equilibrated with air having extra carbon dioxide as might be present in a home (1000 ppm). Clearly, the pH is lower at any given alkalinity when the carbon dioxide is raised. It is this excess carbon dioxide that leads to most low pH problems for reef aquarists. Randy Holmes-Farleysounds like your problem andrew. perhaps an airstone. Quote Link to comment Share on other sites More sharing options...
+ACampbell Posted August 1, 2006 Author Share Posted August 1, 2006 thanks robert. I'll try one out and let you know what happens. Quote Link to comment Share on other sites More sharing options...
Dhayden Posted August 2, 2006 Share Posted August 2, 2006 When I had that issue in my 20g i just did a bunch of water changes and stopped dosing anything. Quote Link to comment Share on other sites More sharing options...
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