TDS question for new seedlings

[roperman]

I've had a couple of grows and haven't used a TDS meter, and I'm planning on adding that to my next grow.

I've read that seedlings (less than two weeks old) should have around 600 total ppm in their nutes. So I mixed up one gallon of seedling nutes from the GWE nute chart for coco. Here are the PPM's after each addition:

tap water: 281
after 1 t CalMag: 620
after 1/4 t Micro: 722
after 1/4 t Gro: 771
after 1/4 t Bloom: 790

CalMag had a huge effect on the ppm's.

Total ppm is 790. Should I dilute this down so the ppm's are around 600? Is 790 too high for seedlings? Thanks!

 

[SirSmksAlot]

I feel that it depends on the strain. Right now I'm growing gorilla glue and they don't like anything over 650 as full grown plants. I'd start off with a diluted solution to start and see if your plants show any signs of deficiencies. Would be a shame to burn them. Just my opinion though

 

[Graff420]

I know my Pml is around 260 for my tap I don't add can mag as I have the same problem with my pops hitting around 750 to 800 when I do my advice is mix up some with a little less calories may as your tap may contain enough for calling may to not be needed my plants seems to do alright without it so I'd try a little less than recommend for you and if it the plants seem to have problems then wing it down some more I just risked it all when I tried to find out if I needed it and stopped using it

 

[Iammygod]

600 ppm? please report EC instead of ppm. You mean your EC is 1.2?
Reduce Ca-Mg dose in half instead of diluting.