Documenting those great aquarium builds on the forum-based communities is not only fun, but you will probably get some great advice along the way. Advanced aquarium keepers will chime in on how they setup their systems, and new hobbyist provide a fresh look at your tank and might give you new ideas. On top of all that, just sharing a few details might help someone else achieve their aquarium goals.
Unfortunately, there’s also a downside to sharing your build. For starters, you expose yourself to tons and tons of potential questions. Another bad thing about documenting those great aquarium builds on the forums is they all come to an end. Sure, it’s fun to share your new toys with the world, but like anything new in the hobby, the spotlight will quickly fade away.