White opaque thing

[wilecyote007]

What is this on my glass?

 

[BrunoSnow]

Aptasia, remove whit a razor blade look for more in your tank, if there are don't try to scratch from the rock because if remains a little piece of tissue they will spread quickly, I use a paste made whit calcium carbonate and iodine and cover them in the rock whit a serynge this method work for me but there are some other options

 

[4FordFamily]

Aptasia, remove whit a razor blade look for more in your tank, if there are don't try to scratch from the rock because if remains a little piece of tissue they will spread quickly, I use a paste made whit calcium carbonate and iodine and cover them in the rock whit a serynge this method work for me but there are some other options

X2