I am slowly setting up an aquarium. One idea I have is using contorted hazel in the tank as I have free access to some branches. Has anyone used it? I have some dried branches with patches of bark peeled off and the wood is a light colour when dried. The bark is very dark and difficult to get off. I have only found a few examples on line of it's use in aquariums but with very little follow up as to how it holds up and effects on the water quality in the long term.