I love decorating my tanks for Christmas! I usually put small stockings by each of their tanks and use Christmas decor too. I'll sometimes only use red and green silk plants for added festivity :)
I also buy them presents and wrap them up and put them under our tree! It's fun.
20 Gallon Planted Community with Mako 2.5 Gallon Planted Tank with Louis
I'm a Scuba Diver because that's as close as I can get to being a fish.