Duff0712 Posted July 9, 2014 Report Share Posted July 9, 2014 I'll admit this I hate math, never paid much attention to it in school. However now I want to know if I'm correct in using it (probably not haha). So if I have a tap of 300 TDS. used 5 gal of DI/RO at 0 TDS and 5 gal of my tap water. That would technically give me a 150 TDS mixture correct? -Duffy Quote Link to comment Share on other sites More sharing options...
Pika Posted July 9, 2014 Report Share Posted July 9, 2014 I'd pull out my TDS pen. While I *think* that TDS should scale linearly, and thus what you say should work, I'd do a test each time until you get what you want. TDS pen makes it easy. Also, tap water changes sometimes, so it'd be good to check so you don't end up with 400 or 150 TDS tapwater and dilute it the same. Quote Link to comment Share on other sites More sharing options...
Duff0712 Posted July 9, 2014 Author Report Share Posted July 9, 2014 Makes sense. I actually just got a TDS own yesterday just doing wondering on theory at the moment. Need to actually check my tap for TDS haha -Duffy Pika 1 Quote Link to comment Share on other sites More sharing options...
Pika Posted July 9, 2014 Report Share Posted July 9, 2014 You will love your pen. It's so easy, instant gratification. And, if you're like me, you'll go around testing all the water around you for a few days... Quote Link to comment Share on other sites More sharing options...
Duff0712 Posted July 9, 2014 Author Report Share Posted July 9, 2014 (edited) Already tested my tap and 2 tanks. Now I'm going to work and will e testing the tanks there haha. So apparently my tap has a TDS of 50 And my shrimp tank has a TDS of 148 -Duffy Edited July 9, 2014 by Duff0712 Quote Link to comment Share on other sites More sharing options...
Soothing Shrimp Posted July 9, 2014 Report Share Posted July 9, 2014 That's the way I figure out TDS before adding water. So yeah, in theory it should be 150 if you have 300 TDS. Quote Link to comment Share on other sites More sharing options...
Sbarbee54 Posted July 11, 2014 Report Share Posted July 11, 2014 Yes tds will change throughout the year in city water. Mine goes from 20-36tds. Tds pens are cheap so always nice to have a couple on hand to double check everything Quote Link to comment Share on other sites More sharing options...
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