August update
So...not much more tank building been done, hope to put together my big frag tank this weekend

, that will be plumbed into my DT later on.
I will follow with some posts of the test frags I've been keeping in the temporary half filled DT...everything still lit only by our winter sun. I have signs of coraline starting to grow on the 'darker side' of the tank.
These corals have been here for about 4 weeks now and the color change from where I had in them in my current (lighted) tank, is nothing short of spectacular (just my observation). The tank itself has been maturing for about 10 weeks now.
This "normally" very brown table acro, has taken on a golden hue with all the growth points (tips) and bases (on the frags) taking on purplish almost pink hue. Please forgive the shorts strand of chaeto in the pics

. I'm pushing the boundaries here with this set-up...I have the skimmer, heaters, a massive ball of chaeto, about 120kg LR, 200 odd hermits and snails, a couple of my big corals and all my frags...all in one half filled tank, with only the winter sun giving it light....so, who needs a sump?

I may have completely killed the myth that sunlight will cause massive algae problems....but still need to add my fish population...so let's not blow my own trumpet for now....
here is my normally tree bark brown with pink tip table acro....with its new set of colors in just 4 weeks.
a close up shot:
A frag of the same coral...see base color where the new growth has extended.