TDS and nutes

[GSXRnutter]

Hi all, had a look on search, but could not find what I was looking for, so I'm hoping someone has the answer.
I have access the Reverse Osmosis water at 0 tds or 8 tds, the 8 being easier to get, my question is, in a flood and drain hydro system, could I use 0 tds water, add the nutes, then correct the ph, after this I would have what I assume to be the perfect feed! might be wrong, so could I then take this nute solution, then tds it, say it comes in at 400 ppm, then use that as a base figure to either add more nutes to bring it back to 400 as it gets used up, or add more RO water if they are drinking and not feeding, hope you all know what I'm on about, I do in my head, its just getting it down on here? Cheers

[GSXRnutter]

bumpety bump. come on folks. someone must know!!

[jobby2812]

I think what your saying is correct. I don't use a TDS meter but what I have read people don't usually go over 2000ppm as that is high. Sorry no help other than that.

[lkdj2003]

I don't know the answer im afraid. I have moved this post into the hydro section because you may get more answers in here.

[whitewidman]

By the term 8tds (total desolved solids) do you mean 8ppm (parts per million) if so you can treat as zero for easy calculation as 8ppm is such a tiny amount in the first place. If you mean 8cf (conductivity factor) reading on a nute truncheon and you want for instance to feed at 20cf then an off the peg rule is halve the start figure (8) to = 4 so increase to 24 when adding nutes. My tap water reads 2cf so to feed at 20cf I actualy bring it upto 21cf as as only half of the original 2cf reading will be desolved solids the plant can use. Hope this helps and I'm actualy answering the right question.

[Dank Grower]

always add nuts to water then adjust ppm and stay away from canna line its garbage