I currently have blue backing paper on my tank and it's making life difficult reading the drop checker, I try reading it from a different angle but I have yellowish walls so that makes it even worse. I want to replace the backing paper anyway when I do my planted tank, I was going to go with the plant look backing but now I'm not sure. I can't leave it blank as both me and the missus hate seeing the pipes etc, so what colour would be best to set off the tank, the fish and would make it easier to judge the colour of the drop checker?