i was wondering if someone with a ppm meter and a standard multimeter could run some test for me. based on the idea that the soulution builds salts , which adds to electrical conductivity , i wonder if someone could take the ec test with multimeter everytime they check their solution with the real tester. if a bracket could be made( peace of foam or plastic) that has a hole for each probe. nothing fancy just a block with 2 holes to keep probs same distance from one and the other. If some one could post a chart showing the electrical reading for each test they take along with the ppm findings for the same test .this would be appreciated. as many have a mult meter hanging around. the perfect time for someone to start this experiment would be when they are at thier max ppm(prob about 1600-2000 parts disolved solids and continue untill flower where you have been flushing regularly to bring back to 0-200 ppm for harvest. thanks i hope to find a solid relation and have one more threfty tool for a garden for the cheapskates among us. WHAT WHY ARE U LOOKIN AT ME . jk im guilty.

id do the test my self but that would mean buying a total dissolved solids tested myself and thats not going to happen any time soon.

Thanks for putting this up. You asked much better than I did, many months ago. I thought about making a probe to connect an ohm meter to. I've never seen these various meters, up close, but isn't Electrical Conductivity (EC) just another term for resistance? There has to be a way.

Pappy

I'm sure there's a way, but in all reality, a cheapie ppm meter is only about $20 on ebay....

If you are doing a hydro grow and you value the crop you are growing you will be far, far ahead to buy a ppm meter/pH meter/to buy the correct equipment and utilize it to it's fullest in your grow.

good luck

btdt

pretty much what i though..
i did do a test with my multi meter ..put it on continuity test in ohms. and tested my tap water... i then added salt to the water...the results were very noticeable. while typing this i just thought i should have added more salt after first test to see if there was a deminishing point. Oh well .