ID please

[rojhonelle]

Hi not sure what this is but I saw little stuff growin from below the hammer heads

 

[Chris Adams]

are you talking about the things bottom left plug?
If yes pineapple sponge is what it is

 

[stevo01]

+1 Chris

These are good

 

[Dtfnemo]

Agreed those are good, nothing to worry about. pineapple sponge's help filter watter I believe

 

[rojhonelle]

Ok thank you now I can relax

 

[kireek]

The little yellow things look like the beginning of a sponge colony.