Hey dex, yeah, read your post over at the coco section. Thanks for the tip!
What I ended up doing with the biobizz light-mix pots was to flood them like there was no tomorrow. I have a huge Rez under then, so I can afford to get loads of run-off. Then I just manually pump straight back the top until the pot feels well watered.
I'll look into wetters, just want to be sure not to put anything in that might nuke the organic nutes