Sponges-concerned??

[jtravis2]

My tank has been running since 11/2006. I'm starting to see a few sponges (8 at last count) on two of my rocks that seem to be growing quite a bit. The smallest is the size of a pencil eraser and the largest is the the size of a nickel and growing. They are milky white/beige in color and some appear to have green vein's. Last night I noticed a couple of the larger ones appear to have very small tentacles. It's my understanding that sponges are good for your tank; should I be concerned because the number is growing and the exsiting ones are getting bigger?

Jim

 

[victor_c3]

I'll give this thread a bump.

I have something similar to this happening in my tank that has been up since mid January and I'm curious about this as well.

 

[dga]

do any of them look like the sponges below?

 

[Bebo77]

i had a bunch of sponges.. got a copperband... sponges are almost gone now...

 

[WinkeyWoneye]

Yep that sound like sponges but a pic would help. Nothing to worry about, unless of course you dont like sponge's. I like the non-photosynthetic sponges that grow on the underside of rocks. They help keep the rocks from moving or falling.

 

[Mariner]

I like sponges too, although some aren't that pretty. I've got a nice yellowish green sponge growing on some rock beneath a large monti cap. I believe they feed on excess organics in the water column, so they are generally good for your tank.
FWIW,
Mariner

 

[Frick-n-Frags]

they are interesting and they come and go. They help stick your LR together

the only thing bad I ever had a sponge do was grow under some mushrooms and made them hop off.

 

[650-IS350]

Actually the ones that I got from my TBS shippment ( orange, reds, browns ) Tunicates and sea squirts are all thriving and growing in my tank... been feeding them live phyto and zooplankton suppliments.