Tubeworm looking stuff?

[TWYOUNG]

This stuff started in my sump and is now in display. Easily blown off or brushed off. Is it a problem?

 

[ISpeakForTheSeas]

Those are sponges - harmless filter feeders. They shouldn’t be a problem at all for you.

 

[TWYOUNG]

Those are sponges - harmless filter feeders. They shouldn’t be a problem at all for you.

Thanks. I've heard sponges utilize silicate in their structure and wonder if my high levels after treating dinos led to such a proliferation of them?

 

[ISpeakForTheSeas]

Thanks. I've heard sponges utilize silicate in their structure and wonder if my high levels after treating dinos led to such a proliferation of them?

Most sponges do, yes. If there’s a high level of silicates and a sufficient amount of food for the sponges (including things like Dissolved Organic Matter, bacteria, phytoplankton, and some Particulate Organic Matter), then you may see a population boom with sponges.