what are these white dots

paulydee67

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what are these white dots on the back of my fish tank.
20190118_205714asdfg.jpg
 
Hard to tell from the pic.
 
Can be a couple of things, especially if this is a new tank. Sometimes sponges grow all over the place consuming excess nutrients; sometimes is calcium carbonate precipitating out of the saltwater. Have you tried cleaning it off? Is it soft and easily squished or is it gritty?
 
here another one sorry cant get it any better
20190118_205714.jpg
 
Google Spirorbid Worms.
 
worms . If you place a magnifying glass up to them, you can see them on their little spheres
 
they are little worms.i can see the spheres.are they harmful?
 
they are little worms.i can see the spheres.are they harmful?

No - just appears in numbers. I do scrape them off but into a net and reverse net in toilet to totally rid of them otherwise they just plant themselves elsewhere
 
46D90B63-6CAE-4867-ADD1-4A51F2A70ABA.jpeg
Are these the same? Pain to remove off equipment
 

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