[urb77]

Originally Posted by josephxsxn

Having proper gas exchange in your tank is a large key to keeping the PH 8+. There is also nothing wrong with a PH of 8, I would consider that penty safe and be non-worried.

Take a liter of your water and airbubble it indoors for an hour with a small airstone, check the PH after. Then repeat this test with a new liter of water from your tank but with air from outside (put it all outside, or run the airpump out your window.) If both go up you dont have good gas exchange in your tank itself, if only the sample that used outdoor air goes up your home is likely tightly built and the co2 levels are elevated compared to inside causing this gas imbalance. And if its all the same gas exchange is pretty good, at this point more things that consume co2 will help drive your PH up, like running a huge ball of macroalgae under your tank with an aggressive light.

2 large air stones in my sump with the pump out the window solved all my PH issues.

http://www.advancedaquarist.com/2002/5/chemistry
Scroll down to "pH vs. Alkalinity in Reef Tanks" and check out Figure #2.


##Also I see you said your mag is 400.. you mean 1400 right?

Thanks Joseph.

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