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iriedodge View Drop Down
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Joined: January 08 2010
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Points: 168 		Post Options Post Options   Thanks (0) Thanks(0)   Quote iriedodge Quote  Post ReplyReply Direct Link To This Post Topic: Tds
    Posted: October 23 2011 at 7:57pm
I'm curious about TDS ranges for water in peoples aquia. If anyone has a TDS meter and do not mind testing your tank water please post your numbers.

Cheers
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ReefdUp View Drop Down
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Joined: March 20 2011
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Points: 4166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ReefdUp Quote  Post ReplyReply Direct Link To This Post Posted: October 23 2011 at 8:52pm

Measuring a tank's TDS is ...um...not a worthwhile endeavor, no offense.  TDS stands for "total dissolved solids".  A TDS meter measures the number of solids dissolved into the water, and most only measure up to like 999 or something like that. 

 
An aquarium is full of nothing BUT dissolved solids pretty much.  SALT is a dissolved solid.  Then fish poo, sand, etc.  So, a TDS meter will only tell you that you have stuff in your water. 
 
And, if you're still curious, I was too at one point when I first got my TDS meter back in the day.  Not surprisingly, it read 999.  I'm guessing everyone else's will read that too. 
 
Sorry to disappoint, but there are a lot of great tests for an aquarium...but using a TDS meter is not one of them.  Use it for your RO/DI unit, and that's about it.
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iriedodge View Drop Down
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Points: 168 		Post Options Post Options   Thanks (0) Thanks(0)   Quote iriedodge Quote  Post ReplyReply Direct Link To This Post Posted: October 23 2011 at 9:06pm
True, it may not be the most enlightening parameter; however, I have a meter that measures much higher levels and want to make some correlations to other water chemistry and need some other tanks ranges to do so.

Suppose you are testing the salinity of your tank, not using refratometer... Say with a hydrometer it is giving you a very similar reading, not just the salt levels, just a thought.

Best

Edited by iriedodge - October 23 2011 at 9:13pm
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ReefdUp View Drop Down
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Points: 4166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ReefdUp Quote  Post ReplyReply Direct Link To This Post Posted: October 24 2011 at 6:21am

Sure, I understand that it might be interesting to see the amount of "stuff" in everyone's water, but I'm not aware of any TDS meters readily available in the hobby that go above 999 ppm.  (That's parts per million...rather a teeeeeny number...only 0.000999% of the water would have something in it.)  What brand do you have?  I've owned several and seen several...and just did a quick search for one that went above 999 (didn't find one).  I'm going to guess we all have a much, much, much higher TDS than 999 ppm with all the salt, poo, alk/mag/ca we dose, and all the pretty much microscopic algaes/pods/sponges spores, etc. 

 
Ok, so if this is something you're truly interested in, then my reading is 999 (falsely).  What's yours?
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BobC63 View Drop Down
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Joined: January 17 2007
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Points: 8972 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BobC63 Quote  Post ReplyReply Direct Link To This Post Posted: November 07 2011 at 9:09pm
If I remember correctly, seawater has a dissolved solids ratio of 35 parts per thousand (35ppt)... that would translate to a TDS of 35,000 ppm - if you could actually measure it.
- My Current Tank: 65g Starfire (sitting empty for 2+ years) -

* Marine & Reef tanks since 1977 *
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