New Grower Need help with grow spreadsheet formuli....

[TxOld Dude]

So I guess for now I'll keep the formula sheet to myself until I can figure out how to correct this. I'll have to manually subtract the res base from my measured ppm to get the proper deviance for add-back. Otherwise, it comes in too light in the nutes and doesn't give the optimal add-back amounts.

Thanks for trying.

:Sharing One:

Fish

 

[AndyBotwin]

There's really only two ways it can go, with the base ppm subtracted or without the base ppm subtracted. The formula seems to be working properly either way, but I get what you're saying about accounting for the base since it's not actually nutes making up that 127. How about this - can you give me a scenario with all the numbers laid out properly (using your manual calculations) so I can try to back into the formula? You mentioned manually subtracting out the base ppm from the measured ppm, but it seems like that's what the spreadsheet is currently doing. How would the numbers be different?