Aiptasia/ Mojano in overflow.

[ifwisheswerefishes]

I have noticed that my 30inch overflow has Aiptasia and Mojano in it. I can see it while looking up from my sump toward the tank lighting. My display tank does not have any that I can see. I have one peppermint shrimp that keeps them in check. Any suggestions on how to remove them from the overflow? I cannot reach down from the top to where they are located. My tank is a 125 gallon half moon with the overflow in the middle. I have a reef tank that is mostly softies.
Thanks!!

 

[KrisReef]

Can you shut down the circulation, plug the overflow and flood it with freshwater, or other solution, let it simmer for thirty minutes, drain into a bucket, rinse and then restart the circulation again?

 

[ZoWhat]

When did peppermint shrimp start eating majanos?