Are sponges good?

[k_jenkinson]

I've been told that i have sponges in my tank but unfortunately I don't know what they actually are or what kind it is. They are lime green and look like it's got a mouth. I just wanted to know if they are good or if it's something i have to worry about. They are multiplying and i haven't done anything different to my tank but they seem to be going out of control

[Joe Reefer]

A picture would be worth a 1000 words in this case.

[andresont]

Sponges are good when they alive
Bad when dead

[Matt]

I have a few lime-green sponges in my nano. They are harmless, and easily removed if you don't like them. They're lovely to look at.

[andresont]

I have a few lime-green sponges in my nano. They are harmless, and easily removed if you don't like them. They're lovely to look at.

get "Sponge power" http://www.jlaquatics.com/phpstore/store_pages/product-info.php?product_ID=zv-spwr050

i got a bottle, just started using.