So I just got a TDS meter on Friday and I have a question, but here is my info first:

My tap water is around 300 ppm. I changed my res for the first time on 9/28 and added 55 ml of nutes. On Friday (10/5), my ppm was around 500 or so, so I added 30 ml more which brought it up to around 700 ppm. Yesterday (Sunday) it was down to a little under 500 ppm, so I added around 50 ml more nutes which brought the PPM to around 875. My reading tells me that 1000 PPM is about average, and 1500 and above gets into the danger zone by not allowing the roots to take in enough water. I am using organic nutes, but I keep forgetting to look at the brand. The plants are being fed for 15 minutes every 4 hours and they seem to be loving it, as the growth has gotten insane since adding more nutes and increasing feedings. They were planted on 9/17 and sprouted on 9/19.

My question is: Is it OK to add nutes often to keep the PPM up or what should I be doing with the PPMs. I haven't found very much info specifically on PPMs on the web.

Thanks for any help that can be provided!
dejayou30 Reviewed by dejayou30 on . PPM Question So I just got a TDS meter on Friday and I have a question, but here is my info first: My tap water is around 300 ppm. I changed my res for the first time on 9/28 and added 55 ml of nutes. On Friday (10/5), my ppm was around 500 or so, so I added 30 ml more which brought it up to around 700 ppm. Yesterday (Sunday) it was down to a little under 500 ppm, so I added around 50 ml more nutes which brought the PPM to around 875. My reading tells me that 1000 PPM is about average, and 1500 and Rating: 5