Featherduster or hydroid?

[anonreefer]

Thought I had baby aiptasia growing on my liverock at first but they retracted too fast when I poke them, leading me to think they were some kind of featherdusters, then after some further research, I saw they could be something called hydroids which apparently are one of the worst of the worst pests, with no predators, they are less than a centimeter in size and it is hard to get a clear shot of them on camera.

If these are hydroids of a similar pest, how do I get rid of them, can i use Aquaforest reef cement, reef glue? what should I do, its on one of my main structures in my reef so the easiest way is by glue or reef cement but not sure what to do.

 

[sixty_reefer]

I believe this ones are colonial hydroids

 

[Borat]

Lovely pets!

 

[Mr. Mojo Rising]

Extremely difficult to get rid of them, they root deep into the rock, but thankfully this type of hydroids spreads very slowly.

I've tried putting glue and reef putty on them, they just grow out from under. I even emptied my tank to 2" inches and used a power drill to drill into the rock to remove them, but they still survived. Short of removing the rock all together, I don't know how to get rid of them so I've left it alone, but like I said, they grow very slow and it hasn't bothered anything in my tank.

 

[Crabs McJones]

Hydroids

 

[anonreefer]

Extremely difficult to get rid of them, they root deep into the rock, but thankfully this type of hydroids spreads very slowly.

I've tried putting glue and reef putty on them, they just grow out from under. I even emptied my tank to 2" inches and used a power drill to drill into the rock to remove them, but they still survived. Short of removing the rock all together, I don't know how to get rid of them so I've left it alone, but like I said, they grow very slow and it hasn't bothered anything in my tank.

I saw them slowly spread, they were really small, tried also using some reef glue to cover them ( a sloppy job all things considered since I thought it was just aiptasia or featherduster ) and they just reappeared after a month, gonna maybe drain 75% of the water, and try putting a thick layer of reef cement all over the rock, hopefully they tick off after that, eventually plan to put some torches and anemones, so heard theyll sting them to death so hopefully theyll just magically disappear after, heard they can't bore through rock, so hopefully the cement works

 

[Borat]

Generally if you lower nutrients and amount of dispersed foods in water columns - these should slowly vanish. Even majano anemonies numbers dwindle when nutrients are low.

 

[anonreefer]

Generally if you lower nutrients and amount of dispersed foods in water columns - these should slowly vanish. Even majano anemonies numbers dwindle when nutrients are low.

i thought I saw a few people saying that, started feeding a lot less ( been struggling with 0.5 phosphates ) and planning to carbon dose my tank soon too, gonna up the rowaphos dosage n zeolights too, still gonna smother them in a thick paste of reef cement so they get a little encouragement to stop appearing altogether.