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Old 05-29-2008, 05:01 PM   #11
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Sorry... should've asked what brand your test kits were.

I don't think most here would consider 1.7-2.8 meq/l "normal". A good alkalinity to shoot would be 2.8-4.2 meq/l, which is the same as 8-12 dKh. Sounds like maybe your alkalinity is a little on the low side, which may be from the fact that your pH is high. You can think of alkalinity as a pH "reserve"... but that's not really accurate. Alkalinity serves as a buffer to guard against pH swings.

Either way... that isn't your problem. I was just asking about alkalinity levels to try and get more data points to try and point to the problem.

You're using a pH kit/color chart for saltwater, correct?
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Old 05-29-2008, 05:15 PM   #12
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Yah, this is a marine kit by Red Sea. I am leaving on a trip till Sunday. I hope the lil guys are okay
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Old 05-29-2008, 05:57 PM   #13
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I'm not 100% on how alk effects pH (but Kurt is about to educate me). Are you premixing your SW and adding a heater to get the temp and pH as close to your tank's parameters?
Are you using the distilled for top-off only or with your salt mix?
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Old 05-29-2008, 06:23 PM   #14
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I'm using distilled water for everything that goes into the tank. PWC and top-offs. I am pre-mixing my water and letting the temp reach 78 degrees before adding to the tank. Ask my gf, I've become obsessive about my tank...but in a good way
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Old 05-29-2008, 07:57 PM   #15
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Quote:
Originally Posted by roka64 View Post
I'm not 100% on how alk effects pH ...
I don't think it does, really. I was just asking about alkalinity because if it was really high or really low, that might lead us towards some different questioning.


Quote:
(but Kurt is about to educate me).
Nope. :p
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Old 05-29-2008, 08:29 PM   #16
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Chemistry and the Aquarium
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Old 05-29-2008, 10:16 PM   #17
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Wow, lots of math stuff. After a hard week, a day at the Baltimore Aquarium tomorrow, I have that link bookmarked for later reference....
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Old 05-30-2008, 11:50 AM   #18
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Scott, I can't believe you haven't read that before. Randy's articles on chemistry are 'mandatory reading' IMO.

I would take a water sample to the lfs for testing to confirm your readins. pH can change quickly in a sealed containter so go the nearest lfs. I would also pick up a different test kit to double check the readings.
You should also get an Alk test that gives you a precise number, I use the Salifert kits for Alk, Ca, and Mg.
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