Tank Background Restrictions?
 

I'm considering making a custom aquarium background for my tank for my red eared slider. Is there any reason it needs to look like a river bed,are there colors known to cause stress? I'd rather ask than make it and the animal become stressed by it. It's just going to be an under water cityscape and a little hut drawn where the basking spot is.

I'm sorry if this question sounds silly! I'd rather seem silly than cause harm though.

i would just keep it to more dull/earthy colors. there are no colors that are known to cause stress as far as i know and there is no reason that the background must appear like a river bed. backgrounds are mostly just for our own viewing pleasure. the most important thing is to make sure all the animal's care requirements are met and the materials are animal safe and not toxic.