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Old 09-02-2007, 07:43 PM   #11
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Um, is that pH right?
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Old 09-02-2007, 08:23 PM   #12
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Quote:
Originally Posted by zacusmaximus
Um, is that pH right?
I'm sorry, that looked confusing. I fixed it.

The pH of the water coming out of the ro is 6.5. After adding the RC the pH in the tub is 7.7

HTH
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Old 09-02-2007, 09:15 PM   #13
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still quite a bit too low..check it after it has been aerated for 24 hours and see what you get.
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Old 09-02-2007, 11:05 PM   #14
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I mix RC with DI water and after about 1 minute of the powerhead going the water is crystal clear. I've never had problems with it not dissolving. Mine dissolves almost instantaneously.
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Old 09-03-2007, 12:13 AM   #15
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I think we may have hit on something. I had only a small amount of ro in that tub. I put enough RC in for the amount of water I was planning on making and then let it fill up. Maybe next time I will let the tub fill up and then slowly add the salt....

EDIT 9/3/07:

I found an article this morning that explains exactly what I think happened. Under the title "How to Mix Artificial Seawater" the author gave an explanation of what I think happened: "Adding the salt before the water can be okay, but causes an unusually high salinity for the period when you are adding water, which can result in the formation of certain precipitates that may be hard to redissolve."

I mixed up a sample batch this morning by starting with the total amount of water and adding an appropriate amount of salt mix. Everything dissolved and left no cloudiness. For now I will say Problem Solved.

As far as pH goes, after a night of aeration the pH is still around 7.7. What should my target pH be and how should I get it there?
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Old 09-04-2007, 11:19 AM   #16
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That pH is probably because you don't have enough surface ripple. Try adding a larger ph or point it to the surface. I use RC and prefer it over IO. I have never had a problem with it. I also keep a fresh batch of PWC going in a 32G bucket. Once you have mixed the salt in a few times, you will get the hang of how much salt to add to how much water.
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Old 09-04-2007, 11:58 AM   #17
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I mix RC with DI water and after about 1 minute of the powerhead going the water is crystal clear. I've never had problems with it not dissolving. Mine dissolves almost instantaneously.
I concur.
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Old 09-04-2007, 12:10 PM   #18
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Yea SparKy697 I agree with the article you found to explain the cloudiness. When I mixed up the salt to catch my mantis shrimp, I put about 3 cups of salt in a gallon and half of water. The salinity was at least 1.040 and I couldnt see to the bottom of the bucket, about 5 inches deep, it was so cloudy.
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Old 09-04-2007, 01:04 PM   #19
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Quote:
Originally Posted by SparKy697
As far as pH goes, after a night of aeration the pH is still around 7.7. What should my target pH be and how should I get it there?
This is probably because you don't have a DI unit. DI will remove charged particles that affect pH. Your live rock should help buffer the water. Are you also using argonite sand? If so, then I wouldn't worry until the whole setup is together and the pH is still low.

Do not add any pH up products. This is very hard to keep stable in the long run. Stability is more important than perfect parameters.
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Old 09-04-2007, 01:15 PM   #20
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Dskidmore, I think the Joe is in the process of pre-mixing the water.
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