Thanks for the nice words, folks. I've been trawling RC for several years, even though I haven't posted much. Tanks like chingai's and the TOTM have been a huge source of inspiration, guidance and envy.
Here's the tank with the Becketts off and in full late autumn sun:
In winter, the angle of the sun means the front of the tank is a little dark. I've measured PAR at the back of the tank at 400mE/m-2 at 6ft depth. Here's what the sun looks like in afternoon sun in summer:
I'm thinking that a diffuser of some sort could spread the light around the tank better. I don't want to compromise on the glitter lines, so I'm not sure how to do this. I don't want to use shade net, particularly in winter, 'cause it'll cut PAR too much (around 70% for the best stuff I can get here). I was thinking about cutting holes in the diffuser to get the glitter lines, but also get some diffusion. Not sure if this will work as intended.
There's not much to show on the machine room side. It's mostly a shared water body at the moment. 15 x 660L tubs and the tank empty into a shared 1000L in-ground sump. 5 others are currently separate. I run around 600mg/H ozone into a (hopelessly undersized) borrowed Deltec skimmer: