| Thanks Dick,
Your right, personal colour preference does come into it. I was sort of thinking what do the coloured backgrounds look like once they start to get some growth on them?. I do like black because I think it shows your tank inhabitants like the jewels of the sea they are, but I was interest to see if there were any difference in how they show up once the coraline starts to grow i.e. does one colour look more grubby/dirty than the other faster.
Cheers, Chris | 
