Looking fantastic. Drooling over your tank. Set mine up last week and already i'm swamped in algae, definately havn't got the knack for getting the balance right in larger tanks.
Ian, are you using a solenoid + regulator on this tank, or just a regulator? I'm getting REALLY inconsistent CO2 in my tank atm. I turn it on in the morning (yet to buy another timer) and it can be running at 1bps roughly, then just before i turn it off about 7pm it is running the same. Then the next morning i turn it on again and it may be about 1 bubble every 3 seconds. Infuriating.