Growing in Coco and needed instruments.

For growing in coco I think that the PH tester is essential, but is the EC, TDS meter required, since I will use the run to waste method with 20% run off?

IMO yes it is.

I grow in coco and I use a digital pH meter and an EC truncheon.

By testing your runoff for EC you can get a good basis of what's happening in the rootzone.




J

Need to spend some money on a good ph pen, The E.C. or ppm pens i found the cheap ones work just as good and the expensive ones. Not the same with the ph pens, the cheaper they are, they more wacked out readings you get. Ive never checked my runoff e.c., if you water with a good 20% runoff you will flush the salts and not have a problem. Some people water with little to no runoff and then it would be a good idea to check runoff to see if its time to flush medium or not.