Yellowing advanced nutrient question

Ok so we got this formula from a guy in Colorado and they used 1.2 ec in veg and beginning of flower and it works it's way up to 1.4 ec at week 6 and then a 2 week flush...

We used it last time and the product turned out great, however there was yellowing that started week 6... The pure water we use now is .6 ec to start with... We are in veg right now and there is some yellowing... I'm thinking they need more nutrients.

Has anyone used a formula that was so low in nutrients? We ended up flushing for a good 3 weeks, and the product still has some crackling when you smoke it so I'm not sure if that means we didn't flush enough or what..

any thoughts are greatly appreciated! Thanks for reading...

Anyone? Site went down after posting this

Crackling could be weed that is too wet or too high in nitrogen content.

It must have been too wet last time. Leaves were yellow last couple weeks of flower, so probably not nitrogen