How many tridacnid keepers here?

[Aquattro]

Tony, IMO, moving a clam around to feed it is just asking for trouble. Especially if you place it somewhere it can attach and you tear the byssal thread. This will result in a dead clam. I didn't feed my small clam, but I have a lot of micro-bugs swimming around the tank. Most people recommend feeding clams less than 2" though. Reefcentral has a board dedicated to tridacnids; maybe take a look there.