What are these white things?

[salty420]

how large can they get because i have them on my seahorses tank and theyve been there for like 3 months and are still like the size of the tip of a pencil lol

that's as big as they will get, they are tiny little guys

 

[mcsassy]

wow Sassy, your tank looks awesome! How did you get your rocks to stay like that?

Thank you! I picked out the rocks by hand at the LFS and set them up while I was there...I had the idea of making a bridge before I even went to go pick out live rock so that is what I attempted to do. The bridge is just one giant piece piece of tonga. Btw, the rock under the bridge has proved to be more of a surprise than I expected...it houses 3 firefish and 2 diamond spotted gobies when they get scared or go to sleep at night...they have a tunnel down there and probably a lounge too. So ya the branchy stuff is great for aesthetic purposes and getting creative...it is also not that hard to break apart too if you want to use little pieces or just need to cut down on its size. Hope that helps.