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Old 05-10-2013, 01:01 AM   #16
Clemsons2k
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Ok all I had was strips on hand (I couldn't find the liquid tests for GH and KH locally in the past). I'm going to have to make an Amazon purchase here soon haha.

But anyways I tested my tap water and tank water in duplicate to discount individual strip inaccuracy.

Tap = 1-2 GH and 6-7 KH
Tank = 4-5 GH and 6-7 KH

And measured TDS again,

Tap = still 25 ppm
Tank = 139 ppm


Thoughts?
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Old 05-10-2013, 01:10 AM   #17
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Rocks in your tank? Substrate? Something is leaching minerals in the tank, which is a good thing in this case.
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Old 05-10-2013, 01:17 AM   #18
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I have a fake rock structure, and I'm using Petco sand as my substrate. I also have a couple small pieces of driftwood in the tank. Nothing out of the ordinary. I dose 1mL of Flourish once a week and every other day I dose 1mL of Excel (which I'm going to stop since its becoming a shrimp tank).

So either the flourish is boosting my params, which I'm sure is unlikely, or my tap readings were wrong.
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Old 05-10-2013, 01:58 AM   #19
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Default Low Tap TDS

Everything you add to your tank will increase your TDS. Seems like you have great water out of the tap. You will need to add some Calcium and magnesium to increase your TDS for shrimp, or you can just buy one of the many water supplements on the market


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Old 05-10-2013, 02:07 AM   #20
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Maybe you don't do many water changes or large ones but do lots of top ups. That will raise the tds as well.
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Old 05-10-2013, 02:15 AM   #21
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I just did a 20-30% water change and my TDS is down to 103ppm.

Great tap water, just kinda scares with with the mineral content for the Neos that shall soon be inhabiting the tank.

So its probably just organic matter and whatnot building up in the tank. I just need to wait until monday for my liquid GH/KH test kit to see for sure where I stand with other parameters.
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Old 05-10-2013, 02:25 AM   #22
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You will be ok


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Old 05-10-2013, 03:15 AM   #23
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Default Low Tap TDS

Just remineralize your tap, I do it with mine. My gh out of the tap is 1 kh 1. So I remineralize to tds 150 and I get kh1 gh6 and I keep all my neo tanks at tds 200-260


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Old 05-10-2013, 04:19 AM   #24
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I heard Sc waters are hard... if you get it soft you are lucky.. >.<
if the water is hard you need to use Ro water to lower it
if the water is soft you have less thing to worry about, adding stuff to increase it works well too... better to be soft than hard <-- water
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Old 05-10-2013, 04:53 AM   #25
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What is a normal TDS reading for a neo tank? I've been wondering that because I happen to have a digital TDS and pH reader. Calibration is definitely something to look out for, just tonight I had to recalibrate my ph meter, was telling me my shrimp tank was 8.1, I knew that couldn't be right. Fixed it and it came out 7.0 as it should be.
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Old 05-10-2013, 06:01 AM   #26
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Quote:
Originally Posted by Nemue View Post
What is a normal TDS reading for a neo tank? I've been wondering that because I happen to have a digital TDS and pH reader. Calibration is definitely something to look out for, just tonight I had to recalibrate my ph meter, was telling me my shrimp tank was 8.1, I knew that couldn't be right. Fixed it and it came out 7.0 as it should be.
It varies from shrimp keeper to shrimp keeper but it mostly depends on your GH, KH, and whatever else is dissolved in your tank. Personally, I keep my neo tank anywhere from 270-320 PPM tds. Though I'll probably bump that up a bit since I added some Caridina babaulti to my tank.
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Old 05-10-2013, 11:16 AM   #27
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My KH reading seems plenty high, I guess I'll have to find something that only affects GH.

And Greenville SC has some of the best water in the country from what I've read. It comes straight off the mountains and we process it first before any other cities. Apparently we won Best Tasting Water in North America in 2011.

http://www.greenvillewater.com/waterquality.pdf
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Old 05-10-2013, 04:52 PM   #28
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Old 05-10-2013, 05:55 PM   #29
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Quote:
Originally Posted by Monster Fish View Post
If you can't get RO water, try distilled. Though TDS calibration fluid works as well.
Quote:
Originally Posted by Monster Fish View Post
**** Also, I retract my statement before. You shouldn't use distilled water to calibrate your TDS meter.
My curiosity has been peaked by these two posts, mainly the last one.

Why not? I've used store purchased distilled as a zero reference to baseline all my titration tests. Is there something different to address with conductivity?

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Old 05-10-2013, 10:59 PM   #30
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Quote:
Originally Posted by wkndracer View Post
My curiosity has been peaked by these two posts, mainly the last one.

Why not? I've used store purchased distilled as a zero reference to baseline all my titration tests. Is there something different to address with conductivity?

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Two TDS meters, one that's calibrated and one that isn't, will both measure the TDS of distilled water to be 0ppm. Since there are no ions in the water, there is no way of testing if one TDS meter is off by 30 or so PPM or if the other is accurate to +/-5 ppm. The best way to calibrate a tds meter is to use a NaCl solution with a specific TDS value. For most freshwater usage, a NaCl solution of 342 PPM will suffice as calibration fluid.

I forgot where I found the link with this info but HM Digital states that you shouldn't calibrate a TDS meter with distilled water.

http://www.tdsmeter.com/calibration_maintenance.html
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