Help needed

Sunshine63

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A week or so ago one of my seahorses died. Then yesterday another died for no apparent reason. Tonight I noticed these on the glass.
Anyone know what they are? Hyoid Medusa? How do I get rid of them?
E9A4FC2E-C15D-4FBF-9DD9-D87F5CB31B11.jpeg
 
Hydroids. Likely had nothing to do with the seahorse. Seahorse require a lower temp tank and multiple feedings per day. Figured I'd toss that in since your only other post was about clownfish
 
Definitely hydroids, getting rid of them can be tricky, but they can't kill adult seahorses. They can definitely be a problem in seahorse fry tank, and as I understand this is the primary reason that fry tanks are started with just water and not kept running in between runs. They will grow and be present in some form in any tank with a lot of particulate food or copepods, especially in high flow areas, and the hydra stage you're seeing here is more indiciative of their presence than actually the cause in itself - these ones probably can't sting much of anything yet.

As far as I've seen, there's not a lot you can do in particular for reducing their numbers safely, but some amount of manual removal at least in theory can help. Cleaning your plumbing and removable bits can be helpful, as they will often colonize inside of overflows, pipes, etc., but it's not like the colonies in there will be able to hurt your livestock.
 
I cannot understand why I have them in my new 90 in the hundreds ( with no lights on ). but not in my original 45. Same water same salt ect
 
At least in the case of the 90, they are fast to colonize, nonphotosynthetic, and if there aren't things bumping into them, picking at them, or competing with them... they could have plenty of space to stretch the proverbial legs.

If you seeded the 90 from the 45, I'd expect the quantity to go down substantially when other organisms and light is introduced, because if the species you've got couldn't win the battle in the 45, they are probably just not being contested in the 90.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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  • Not yet, but I have one that I want to buy in mind!

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  • No.

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  • Other (please explain).

    Votes: 3 4.3%

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