Can you help identify these?

[RWCrouch]

I am new to reef aquairiums, venturing forth with a 28 gal JBJ nanocube. Also have a 150 gal FOWLR. Things are going well, except for controllable (thus far) appearances of bubble algae, hair algae, and aiptasia. However, I have all sorts of interesting other things that have begun to grow (that I did not add intentionally). Wondering if anyone can help me? We have two snails, each with something growing on the shell, we have named one Christmas Tree snail and the other Easter Lily snail because thats what that jokingly look like. The Easter Lily has also appeared one other place in the tank attached to live rock. I fear Christmas Tree snail will not be able to wonder around too much longer as this thing grows about a half inch a month.

 

[shred5]

I cant tell what the snail is in the first pic, But the second and fourth look to be astrea snails.

The algae in the 3rd pic is a calcium carbonate algae like halimeda called Neomeris annulata which is an ok algae.

 

[RWCrouch]

Thanks, dead on with the Neomeris annulata ; yes, they are astreas, I knew the type of snail. Now if we can just figure out the Christmas Tree

 

[shred5]

Laurencia sp.
Marine Plants in the Aquarium
I assumming you got some florida aquaculture rock or some gulf rock by the species of algae.

 

[Troylee]

Defiantly looks like Florida Rock.. It has all kinds of life while it's really cool your finding out that pest come with it... I think shred nailed the Xmas tree snail it's a algae the other one I have no clue...