Interesting...
I am in week six on two LSD and two Critcal Kush ladies , my first complete run with Ionic.
In the name of keeping EC low in UC, I started around .5 and worked up to .7 where I started to see burn. I guess it was burn, but it might have just been deficiencies. It pisses me off that after all these years I STILL have trouble distinguishing the leeaf appearance of nutrient toxicity vs simple cal mag deficiency. Seems like when I chase down one... it's the other.
Anyway, they seem pretty happy at around .5 to .6 but I am seeing a bit of tip curl and crispness, which tells me I'm over feeding a bit. ( I actually all but killed one sensitive LSD by over feeding it... see my one of four deficient thread) But the rust colored edges and some red petioles hint at mag def. A recent post here somewhere talked about being able to stay under .6 or as high as 1.4 as long as the cal mag were kept in line, which I think is my problem. The lower schedule lets them thrive without burn but probably does not provide enough cal mag .