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I believe I have colonial hydroids on a piece of Live Rock. I have heard that a Hydnophora will kill them...is this true?? Any other ways of getting rid of them??
Also, will a Hydnophora kill aiptasia??
I know this isn't what you want to hear...but from that picture, it looks like the bulb is brand new. If you can clearly see through the bulb then its a new bulb. As soon as electric passes through them, the gas inside the bulb causes a haze on the glass. Compare it to an old bulb.
But that...
Are the physical bulbs harmed at all?? Are they completely clear?? I know my bulbs...when brand new they are completely clear....but as soon as they are first used, they get cloudy when off...
I've been trying to find a solution to them as well. I have not yet found a predator of them. Short of snapping them off one by one, they really will never go away.
I'd definitely say Vermetid Snails....I have them as well. They reproduce a lot if they have food...but they will die off as well. But the tubes will always stay.