Can I clean GSP with a toothbrush?

More and more of my GSP has been failing to come out ever day. Other polyps are super happy, so I don't think it's water quality, but I think there may be some algae growth on the GSP, it looks like diatoms actually. WIll I hurt the stuff if I gently take a soft toothbrush to it when it's closed at night?

 

Don't scrub corals it will just make it worse. GSP is really hit and miss. For some it grows like a weed and for others they can't keep it alive at all. What else do you have in the tank?

 

I have some super happy xenia, glove polyps, and a candy cane.

So basically, the easy stuff!

 

I just blow it off with a turkey baster.

 

I just blow it off with a turkey baster.

Agreed, this would be the best option as it won't have something abrasive coming into contact with it.