tds meters - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 08-21-2014, 01:13 AM Thread Starter
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tds meters

Ive been shopping around for a tds meter, is there a preferred make and model? There are a tone out there ...
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post #2 of 6 (permalink) Old 08-21-2014, 01:35 AM
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Likely you will end up concluding as I have that the brand known as "Cheap" is preferred. @ about $15 from e-bay. Don't see any provisions to change the battery on it from what I can see either. Hopefully as seldom as I use it, the life of it will exceed a year at least.
The problem I seem to have with this issue is that the ingreedients of those things which you would use to raise the TDS level are listed vaguely at best on those products. I am not one of the fortunate ones who can spend whatever they like on my hobby. I (think) I can see that those ingreedients are exactly the same as MGSO4
and CaSO4. If these cost $4 per pound, then why would I buy "Equalibrium" for $6
per OZ ? But since Equalibrium says..."contains Calcium salts" I really don't know they are the same. So I hessitate to use them instead of Equalibrium.
I simply can't use a $6 per OZ product every time I change water. So the TDS meter
serves what purpose ? Believe me that if I was to buy shrimp that cost $49 for five of them I would also buy Equalibrium. But as long as I just keep RCS...
I looked it up and the store on e-bay which I bought mine from @ $8.95/free shipping was "podvillage"...

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Last edited by Raymond S.; 08-21-2014 at 08:15 AM. Reason: I looked it up...
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post #3 of 6 (permalink) Old 08-21-2014, 02:41 AM
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Originally Posted by Raymond S. View Post
Likely you will end up concluding as I have that the brand known as "Cheap" is preferred. @ about $15 from e-bay. Don't see any provisions to change the battery on it from what I can see either. Hopefully as seldom as I use it, the life of it will exceed a year at least.
The problem I seem to have with this issue is that the ingreedients of those things which you would use to raise the TDS level are listed vaguely at best on those products. I am not one of the fortunate ones who can spend whatever they like on my hobby. I (think) I can see that those ingreedients are exactly the same as MGSO4
and CaSO4. If these cost $4 per pound, then why would I buy "Equalibrium" for $6
per OZ ? But since Equalibrium says..."contains Calcium salts" I really don't know they are the same. So I hessitate to use them instead of Equalibrium.
I simply can't use a $6 per OZ product every time I change water. So the TDS meter
serves what purpose ? Believe me that if I was to buy shrimp that cost $49 for five of them I would also buy Equalibrium. But as long as I just keep RCS...
A mistaken post, perhaps...?

Anthony


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post #4 of 6 (permalink) Old 08-21-2014, 03:55 AM
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Quote:
Originally Posted by Piscesplunder View Post
Ive been shopping around for a tds meter, is there a preferred make and model? There are a tone out there ...
I got an HM Digital AP-1 and am pleased with it. I found an offer on Amazon that came with calibration solution (try searching with this string "HM Digital® AP-1 AquaPro TDS meter ATC, thermometer & HM NaCl 342ppm calibration solution").

The cheaper ones from that company had analog (i.e. screwdriver I think) calibration, this one was the lowest end with digital (push a button basically). It also simultaneously shows temperature and is water resistant.

So far (about a month) been quite happy, but I did not do any extensive comparison.
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post #5 of 6 (permalink) Old 08-21-2014, 04:09 AM
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I have this one, no problems at all.

HM Digital TDS-EZ


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post #6 of 6 (permalink) Old 08-21-2014, 07:34 PM
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I also have the HM Digital TDS EZ. $15 on amazon. Very happy with it.

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