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Old 06-30-2005, 10:52 PM   #1
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Water carbonate hardness

ok, here is the deal. i have a R/O system and after the water has been filtered i get a KH reading of 2 which i know is not "hard" enough for SW fish, anyone got any suggestions.

Thanks
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Old 06-30-2005, 10:55 PM   #2
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Do i have to wait till i get the salt mixed with the water and aged before i can test for this?
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Old 07-01-2005, 08:53 AM   #3
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You can test before, but you need to "buffer" the water to get the proper readings. Some say before you add the salt. I would just add the salt and then test. You should be ok then after adding the salt, if not just add the proper buffer to get within normal limits...
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Old 07-01-2005, 10:48 AM   #4
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Quote:
Originally Posted by andy_b22
Do i have to wait till i get the salt mixed with the water and aged before i can test for this?
exactly. your salt mix is going to contain buffers to bring it back up.

However, a proper RO/DI unit should leave you with undetectable Kh, and a neutral 7.0 pH.
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