Weird issue.

[sewerman45]

Originally Posted by reefwars

most likely is a bacterial film , if it was calcium carbonate it wouldn't flake off so easily i get this from mine as well when restarting the returns

That makes a ton of sense. Any idea what causes it? Or if it's bad?

[gobytron]

could also be tunicates/sponges that have formed in your line...

[reefwars]

Originally Posted by sewerman45

That makes a ton of sense. Any idea what causes it? Or if it's bad?

its a byproduct of the bacteria , shouldn't cause any harm after all it was always in the water anyways


the bacteria have to colonize somewhere , its often in the places we think last to look lol


in any case if the tank is healthy i woudn't worry much about it

[asylumdown]

Do you dose any kind of liquid carbon? Those bacterial mums build up a lot faster and thicker in carbon dosed tanks.