# Adjustments - TDS and EC **URL:** \ **Category:** Grow Support\ **Created:** [October 23, 2022, 5:03pm UTC](https://ilgmforum.com/t/adjustments-tds-and-ec/94662 "2022-10-23T17:03:38Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![MidwestGuy](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/midwestguy/32/914277_2.png) [@MidwestGuy](https://ilgmforum.com/u/MidwestGuy)\ **Post date:** [October 23, 2022, 5:11pm UTC](https://ilgmforum.com/t/adjustments-tds-and-ec/94662/2 "2022-10-23T17:11:23Z")
TDS/EC/PPM is a measurement of the presence of dissolved solids (fertilizers) in your feed or your runoff. The 3 (TDS, EC, and PPM) are different ways of looking at the measurement of those dissolved solids. Feed more for a higher PPM. Feed less for a lower PPM. Maintain PPM as close to 1,000 as you can through the grow. Many of the members here use Jack’s 321, the Fox Farm Trio, General Hydroponics, or Advanced nutrients. > [@Understanding PPM, TDS, and EC and how it affects your grow](https://ilgmforum.com/t/understanding-ppm-tds-and-ec-and-how-it-affects-your-grow/61821): > > Just bought a new meter an i 'm new to PPM, TDS, and EC I’m aware they are all about the same thing that they are the amount of nutrients in your solution just different meanings. But what I’m having issues with is scaling the nutrients to the right rates. I know its a lot of trial and error but I wasn’t sure if someone could give me a good starting point. I’ve tried using measurements for 4.5 gal in a 5 gal container full and still measuring around 1… --- _[View the full topic](https://ilgmforum.com/t/adjustments-tds-and-ec/94662)._