dead salts ???

[nog]

i keep reading stuff about "dead salts": the story goes something like this, the salts in your tap water are "dead salts", so if the ec if your tap water is 0.30 or what ever, you ignore the 0.30 in the final reading of your nutes, because the plant cant absorb these "dead salts"?
I am confused, why can the plant absorb salts i put in the nute solution but not those put in by the water company?
is this true or is it one of those myths that get repeated so often on the net that people think their true? ffs somebody enlighten me on this.

 

[SSHZ]

Never heard of this before and I've been around a long time........... a salt is a salt in my book.

 

[nog]

yes thats what i think

 

[Tobor the 8th Man]

I have heard that what ever the ppm of your tap water is only use half of it to figure out you total ppm. So if you want to feed at 1000 ppm and your tap water is 400 ppm you add nutes until it reads 1200 ppm. Then when you subtract half (200 ppm) you are at 1000 ppm even though it reads 1200 ppm.

You thought algebra was the only confusing math didn't you?

 

[nog]

yes check this out.