Hi all,
Thanks for your kind comments, just want to add a few things,
The phosphate reactor is to remove phosphate.
The blind which is drawn at night on the sky light has a number of functions.
Firstly it keeps the tank dark in the summer mornings, which would normally start to illuminate the tank at say 4.00 in the morning. Secondly, it helps keep the heat in during the winter nights.
Regards
Martin