nice to meechya
not a veteran grower by any stretch, but i've not long completed my first grow, following very closely the techniques showcased by your aforementioned vets. i was determined to follow their no-pH-required style, and to some extent i had success, but i have realised that there is an element of chance to get that style to work for you - mainly in terms of how your chosen water supply reacts with the AN pH "Perfect" formula. they also both grow in a lightmix soil, which is a relatively forgiving medium with buffering capabilities. not sure how your Coco-Loco stacks against lightmix soils though. PH is way more important than i gave it credit for when i started growing...i had a few problems here and there and found it difficult to get help with the issues because i had no pH information. i grow in soil, but i'm guessing your medium will be on the more unforgiving side.
basically what i'm saying is growing without the need to pH is a bigger skill than i had anticipated, lots of factors are in play and for some the stars do align...for others, pH can cause a host of difficult-to-fix issues.
all the best, i'll follow along