Two Questions

[Ashto Brado]

So I have a 29 gallon saltwater aquarium I’m planning on making a community tank out of. I would love to know what kinds of inverts I can put into this tank.
There are already some of these, what seem like, baby feather dusters on my live rock. I would like to know if that’s what they actually are.

 

[JtheFishMan]

When I get my saltwater tank cycled, I am going to use nassarius snails. They are very cheap, take up little space, and are excellent workers. They also aerate your sand, so that is another positive.

Depending on your residents, hermit crabs, lobsters, and shrimps can also be some more interesting invertebrates to add to your tank.