I would imagine a forum search on this one or the general fresh forum would bring up some. DOn't worry about finding one for a 25gal, what areas of construction are you looking for help/ideas with? I am sure that you are not looking to make a carbon copy of someone elses tank, so just sift through all the journals you can and pick out the concepts you like. Also, consider the local library. I found a gem of a book at mine, Aquarium Designs Inspired by Nature.