<span class="link_user">@MovingOn</span>, I repotted the plants into the autopot system in week 5. At this stage they were pretty maxed out on root space in their existing containers. when I repotted the plants I gave each 2.5 L of water into the medium and from then on the system did the rest
When these three nutrients are used it seems to be a comprehensive enough range not requiring anything else. (other than a flowering nutrient). I'll continue to use them all.