What is this? HELP???

[Bofa]

I have this brown stuff that is growing everywhere in my tank. Anyone know what it is? Pic Attached. Thanks

 

[Bofa]

Here is another picture of it.

 

[Ohiomom]

Any chance of a clearer picture..very hard to see any detail that may help with an id..

 

[H20ENG]

Hydroids maybe? Do they look like tiny anemones?

 

[KarlBob]

Is it a brown/red slime that coats everything?
Powdery brown deposits, almost like snowflakes?
Tiny tubes with even smaller brown arms waving at the ends?

 

[Bofa]

Tiny tubes with even smaller brown arms waving at the ends? <<<<<< It is this one for sure!!! Do you know what it is?

 

[KarlBob]

Yup, those are hydroids. Some of them aren't so bad, but others are capable of stinging and killing some corals. I don't know how to get rid of them, but now that we've ID'ed them, someone can fill in that part.

 

[Bofa]

yeah they cover my corals and are growing everywhere... Thanks KarlBob! Anyone know how to get rid of these Hydroids?

 

[Bofa]

They look like this>>>

 

[Bofa]

They look like this:

 

[possys]

I Don't know what that was but I love it

 

[Bofa]

They are Hydroids. Does anyone one know how to get rid of them?

 

[KarlBob]

I've heard three suggestions. In order of severity:
1) For a smaller patch, cover them repeatedly with a thick paste made of kalkwasser powder and RO/DI water.
2) For a larger patch, take the rock out of the water and scrape them off, then cover the area where they were with kalkwasser paste.
3) If they've taken over a major piece of live rock, or large portions of the tank, put the affected live rock in RO/DI water, or RO/DI water and bleach. Leave the rock there for several days, until everything dies. Scrape off as much detritus as you can. Leave the rock out to dry, then shake off the remaining detritus. Rinse well with RO/DI water, then put the rock back in the tank.

Option 3) is the Nuclear Option. It turns a piece of "live rock" into "dead rock". When the rock goes back into the tank, it has to be colonized all over again by bacteria and invertebrates from the other rocks.

 

[Acrophiliac]

Sounds bad. Good luck with that.