ID help

[cdm]

hi i’m new to this hobby. i found this on my sump. i don’t know what it is. is it harmful ?? did i need to clean my sump ??

 

 

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[soggycookies]

those look like filter-feeding sponges/tunicates to me. no harm. they tend to grow in the overflow and initial compartment of the sump cause that’s where more of the debris goes first


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[Otaku Reefer]

should be pineapple sponge, filter feeder, i also have a lot in my sump lol


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[cdm]

thank you both
is it necessary to clear it out from sump or i can leave as it is ??


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[Otaku Reefer]

for me i leave it cos i think will grow back somehow haha


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[cdm]

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[sjrng]

I'd leave them, they're harmless and filter feeders which are good for your tank.