pods?

[docta09]

was looking around in my refug and saw these little bugs that look like fleas :D
are they pods?
oh and i have a hob refug this is around the return... what is that purple stuff? thanks

 

[ErinCahir]

Yup! Pods! And the purple stuff is algae... which the pods will eat. :D

 

[Smitty]

+1 Erin

 

[grdpder]

Yup! Pods! And the purple stuff is algae... which the pods will eat. :D

i had pods before in my tank and filter. now they are all gone. how do i get them back?