Need help IDing 2 unknowns in my tank

[PdThaDude]

Tank has been up and running for 7 months now. Water is spot on. All my coral is open and happy and growing. So the thing I need help IDing showed up about a month after I put my tiger Conch. I thought it's maybe bubble algae but it's not green but the best way I can describe it is it's like little booger balls on my sand. I just found it on my power head and return. But it's like a cream color slime that balls up on the sand.
The 2nd is a bunch of small spiral shell looking things on my glass in my sump

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[billdogg]

the yellow is a encrusting sponge. I'm not too sure what I'm supposed to be looking at in the others

 

[PdThaDude]

the yellow is a encrusting sponge. I'm not too sure what I'm supposed to be looking at in the others

The 2 bottom pictures are the shell things growing in my sump.
Almost looks like tiny mummified worms

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[billdogg]

Spirobid worms


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[PdThaDude]

Spirobid worms


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Thank you

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