What is growing in my tank???

[SajmonPL]

Dear Collegues

I have noticed that for around two days something started growing on the floor of my tank. It looks like white cocoons. Few days ago I have added few new corals to my tank from another tank. Could I bring new unexpected life to my tank? What is it? Should I leave it or take it out? I would appreciate your help on that topic.

 

[uhgster1]

Have you been ghost feeding? Looks like uneaten food. It grows a fungus on it that looks like that. Siphon it out if you didn’t put it there. Better safe than sorry.

 

[SajmonPL]

Have you been ghost feeding? Looks like uneaten food. It grows a fungus on it that looks like that. Siphon it out if you didn’t put it there. Better safe than sorry.

I feed fish with flakes. This look much bigger. It occurred few days after adding new corals.