You've got some serious issues when you starting to see termite infestations all around the house...are you sure those are termites?? they normally form mud tubes and hard to see their droppings, and they will eat away wood...you prob need to inject venom throughout the house, and should get the house inspected for structural damage as they are hidden away inside walls, may not be safe anymore if you start seeing termite tracks all over the house...i would get rid of the fish and tank and worry about the house first...