White dots on back glass

Miami Reef

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Weird white dots that are spread throughout the back wall. It’s sparingly spread out and relatively easily to remove with my finger nails.

I dosed metroplex with focus a few weeks ago but I only recently saw this. How about sand? Maybe some sand blew there? I wouldn’t expect it to stick to the glass the way these things do.

I really want it to be coralline algae.

6F30063E-0819-41F9-9032-5B9734C97C5D.jpeg
 
Weird white dots that are spread throughout the back wall. It’s sparingly spread out and relatively easily to remove with my finger nails.

I dosed metroplex with focus a few weeks ago but I only recently saw this. How about sand? Maybe some sand blew there? I wouldn’t expect it to stick to the glass the way these things do.

I really want it to be coralline algae.

6F30063E-0819-41F9-9032-5B9734C97C5D.jpeg Looks more like spirorbid worms
 
YES! You are right! I noticed it had a shell appearance when I took it out of the water.
 
Weird white dots that are spread throughout the back wall. It’s sparingly spread out and relatively easily to remove with my finger nails.

I dosed metroplex with focus a few weeks ago but I only recently saw this. How about sand? Maybe some sand blew there? I wouldn’t expect it to stick to the glass the way these things do.

I really want it to be coralline algae.

6F30063E-0819-41F9-9032-5B9734C97C5D.jpeg

It is not coralline algae. Do you have snails in your tank? In my own tanks, I find this to be a result of something snails do.

It stops quickly. Clean in off and don't worry about it.

Take a good close look at the dots. Do they have a defined spiral shape to them? If so, the may be spirobid worms.. healthy and productive to your tank.
 
It is not coralline algae. Do you have snails in your tank? In my own tanks, I find this to be a result of something snails do.

It stops quickly. Clean in off and don't worry about it.

Take a good close look at the dots. do the have a defined spiral shape to them? If so, the may be spionid worms.. healthy and productive to your tank.
Would you know anything that can keep their numbers in check ?
 
I agree that they're probably spirorbid worms. They're harmless, if you don't want them on the glass just scrape them off . I remove them from the front or side glass of my tank, but leave them be on the back glass.
 

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