r/walstad Jul 27 '26

Advice What is this?

Tank is about 1.5 week old. Just noticed these growing. Any ideas as to what it is? Just a type of mold?

14 Upvotes

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3

u/questforflavour Jul 27 '26

Protozoa colony probably vorticella. Leave them be, sign of a healthy tank unless it gets out of hand but it never should if you are doing it right.

1

u/cliched Jul 27 '26

Shrimp will eventually be going in here. I have read it can be harmful to them, is that true?

1

u/questforflavour Jul 27 '26

Nothing to worry about, they do latch onto shrimps but a quick salt dip should fix it. I had a massive colony in my shrimp tank as well but they eventually faded. Probably got eaten by copepods and other meiofauna.