Pineapple sea sponge?

[timmyrules]

I was cleaning my tank when I noticed something that looks like a pineapple sea sponge, it’s stuck to the side of a fox tail coral. Is it a pineapple sea sponge?…and is it ok if i leave it on the coral?

 

[vetteguy53081]

I was cleaning my tank when I noticed something that looks like a pineapple sea sponge, it’s stuck to the side of a fox tail coral. Is it a pineapple sea sponge?…and is it ok if i leave it on the coral?

That is indeed a pineapple sponge and often silicates are cause. Can be from new rock, new sand, from tap water if used and expired or leaking Di Resin cartridges.
These are short lived and will dissipate as silicates reduce. You can peel them off with the edge of a credit card into a net if they are too many
They are not harmful and cherish algae if they get any

 

[timmyrules]

ok, cool. Thanks for the reply.