It's a glorious morning here, cold but with honey sunshine. Last night, the moon had the sea shining silver. You can look at the same thing everyday and have it never quite look the same. I wonder how our fish would look if we depended on natural lighting and such, instead of set and programmed lighting?
I helped unpack a few Cameroonian shipments that contained killies, back in the day, and in Spring and summer, we would open the boxes outdoors. The fish were beautifully coloured in tanks, when when you first lift the bags up and look at them in natural sunlight, it's breathtaking. The same is true of most tetras and barbs. Cichlids turn down their colours, so they tend to need time to develop their full beauty.
If it weren't for algae, none of these fish, or the people admiring them would exist. But if algae would just play along with us instead of doing what it does, sunlit tanks would be stunning. I have a few that receive direct light for a few minutes daily, and that's when things look best.