Frog spawn

[marine2463]

My frog spawn has a white sponge looking thing growing in between it .
I was wondering should I remove it or leave it be . The frog spawn is happy and open when lights are on I don't think it's harming it .this picture is bad I know it's dark but can't see it when it's fully open any thoughts ?
Thanks in advance !!!

 

[Gomery12]

Sponges are good filters, if frogspawn is happy, i'd leave it alone, very common hitchhiker!

 

[marine2463]

I know sponges are generally good , but you don't think the sponge growing will eventually irritate the polyps ?