Haha good guesses viper, but wrong on all counts
That's good to hear about the comets and kind of what I was hoping too. They were, until about a month ago, in a 28 litre with a much smaller filter. The switch to the 60L with the much bigger filter has got them a lot more active, playing in the current and foraging over the gravel almost all the time their light is on.
I'm not sure about the reef tank in 6 years time, but we shall see. The cichlids tank sounds good though.
Another thing I would like to try at some stage is a long tank with some serious moulded background and bottom with strong current to simulate a mountain stream. Anyone know if this has successfully been done before?