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Old 09-24-2009, 02:25 PM   #11
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bobo.. Yeah, the TDS meter SHOULD read zero, after going the unit. That's the whole point of the ro/di unit. They are supposed to filter out 99.9% of everything in the water being filtered through it.

TC, thanks for the backup. See, i knew that i heard the PH thing from somewhere, but i just didn't remember where, or if it was correct. So thanks for closure.
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Old 09-24-2009, 03:22 PM   #12
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You're welcome........Bobo, what is your TDS going into your Ro/DI unit?
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Old 09-25-2009, 05:19 PM   #13
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bobo.. Yeah, the TDS meter SHOULD read zero, after going the unit. That's the whole point of the ro/di unit. They are supposed to filter out 99.9% of everything in the water being filtered through it. ...
If bobo only has RO (and not DI), then 7ppm TDS is totally reasonable (and probably expected) coming out. It's the DI stage that will take out the remaining crud and knock the TDS to 0.

Bobo... if you do indeed have a RO/DI, then check your DI resin - it's probably needing replacement.
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Old 09-28-2009, 06:28 AM   #14
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I don't think he has an RO/DI unit, he stated he got the 5 gallons of RO from the local water company. As everyone said you have to get the nitrates down. The thing about your PH going down can be from the coralline stimulater you used, in order to stimulate the growth, the stimulates usually contain high concentrations of calcium, strontium and magnesium which is all good except when you raise your calcium level your alkalinity tends to drop with the end result being a lower PH. Alkalinity is the natural buffer for your PH, when the alk is maintained between 7- 12 your PH will remain stable and usually at the proper levels but if it's out of that range your PH usually fluctuates drastically. Usually when calcium is dosed it's usually done with a 2 part product with the first part being the calcium additive and the second an ALK stabilizer to compensate for the ALK drop caused by the calcium additive. If you can test your ALK level (KH test kit), I like to keep mine at a minimum of 8 preferably 9.
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Old 09-28-2009, 02:45 PM   #15
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Great, I like the way you explained that.
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Old 09-28-2009, 03:07 PM   #16
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Great, I like the way you explained that.
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