Its interesting in the 40 years I’ve kept fish obsession with a perceived perfection has grown exponentially. What is odd is that’s it’s not natural for algae to be absent, if you look at footage from S.America of tetras etc in the wild there tends to be algae everywhere so why are we pursuing such a sanitised version of ‘natural’? I wonder if it’s part of the recent wider cultural shift in the west to obsess with cleanliness, order and perceived perfection that is apparent with homes, cars, teeth, bodies etc Having a spotless toilet, car, a sparkling set of gnashers or ‘higher plants only’ aquarium doesn’t make us better people 😀