Ok, so one week after the puffers went in this is an update i suppose.
First day - only had frozen whilst i waited on LFS live food delivery. Puffers did NOT want frozen BW! day 2 though and the first attempt at live BW..........they took it

All fine from then on until day 6. Day 6 my mrs opened the curtains she is banned from doing and i had sunlight on the tank along with an already high light LED. Algae. I am still in the early stages of removing this, well, i start tomorrow, light reduced from 10 to 4 hours now though
Day 7 - puffers are so colourful now, im hopeful, and slightly confident of 2m 3f from early colouring signs etc, but this is not yet definitive in anyway and i may yet be proved way off the mark.
So, now a direct comparison of the tank a week later....
1 week ago;
Today;
Darn water marks...just fed them and didnt have time to wipe it before lights off. It's due for some proper maintenance tomorrow anyway.
To me, and i think you can see from the photos, the tank is already starting to slowly fill in and looks much less ''gappy'' now. Plants also looking much taller throughout the tank.
Always looking for suggestions and opinions should you have any. Also...can you spot all 5 puffers

??? Enjoy