A list of recommend sites for fish keepers.
Aquatic community has lots of posts and members: http://www.aquaticcommunity.com/aquariumforum/
Aquaria central is one of the oldest forums on the web: http://www.aquariacentral.com/forums/
Aquarium life has good content but ranked lower than other forums: http://www.aquariumlife.com.au/forum.php
Aquarium advice has good info if you content but I would check the other forums first: http://www.aquariumadvice.com/forums/
These forums all have good content for fishkeeping but not much for built in tanks installation etc… You can always visit our forum for info on in-wall tanks: http://www.walltanks.com/blog/new-inside-wall-aquarium-forum/