What do you think about the LED lights on the deep tank?
On the 48" L x 30" T tall tank it creates a nice shimmer and a bright white light (10000K). The actinic leds are vastly outnumbered by the 10000k leds so there isn't much blue, except when it is in nighttime mode with only the actinic leds on. My wife (aka Mermaid) suggested I put blue cellophane over the lens to tint it blue (she is a mini-MFKer!)
When I put the light on my 60" L x 48" T tank, there was no shimmer
Egon: I think you could run two of these light units on your 450 It would brighten it up (not that it is dark) and only use 22 watts! My 30" T tank has a black background like yours and it glows from the led lights.
Sorry I haven't posted picture yet..they are coming, I promise. My ipad is on a business trip with Mermaid and the camera on my phone is terrible. Either way, lighting is always difficult to capture with cameras. Hopefully, I described it with good accuracy and detail.
Pacumom is correct--I have gotten a lot done but there is still more to do. Already have a plumber coming to give an estimate on the whole house water filter install!