Need Help.. ID critters on the glass

[jayvee10]

http://reefcentral.com/gallery/data/500/132388glass_critters.jpg

Hi Guys. This forum rocks!! I'm pretty new to the hobby and I'm glad that I found reef central. A week ago, my 55gal tank was hit with marine ich so I quarantined all my fish. These little critters came out of my glass and growing.

#A & #D - came out one morning all over my glass same time when I saw my yellow tang and blue tang with white spots allover their body. Are these parasites? or copepods?It seems that there was an outbreak of these after 3 days of starting treatment of my fish on the Quarantine tank. The glass looks like they have a lot of dust inside. After that ,they seem to dissapear gradually.

#C - Is this a type of worm? I also saw the attached to my turbo snails.

#B - What are these? I saw one like 4 days ago and now there are about 7 of these already on the glass.

Please help me ID them and If they are safe on the aquarium.
Thank you in advance

[sirbooks]

A and D are both of 'pods, not parasites at all. The white spots on your fish were likely from ich.

Photo B looks like it's of a hydroid of some type. Not really harmful, but they're unsightly if they are on a part of the glass you like to look through.

C is what I remember being identified as a tiny serpulid worm. They're little feather dusters with hard shells, and can be seen over many aquarium surfaces. They come off of the glass pretty easily if you want to get rid of them.

[Fragmented]

Those worms usually show up when there are excess nutrients in the system.---Better than algai IMO.

[jayvee10]

Thanks guys. It's great to know that it is not harmful to my aquarium.

[romunov]

A & D are copepods, B is probably a hydroid - as already mentioned. The C pic depicts a polychaete worm, probably Spirorbis. I have never heard that the occurance of these worms may coincide with elevated nutrients.
http://i53.photobucket.com/albums/g67/romunov/IMG_3929.jpg

[jayvee10]

<a href=showthread.php?s=&postid=8256778#post8256778 target=_blank>Originally posted</a> by romunov
A & D are copepods, B is probably a hydroid - as already mentioned. The C pic depicts a polychaete worm, probably Spirorbis. I have never heard that the occurance of these worms may coincide with elevated nutrients.
http://i53.photobucket.com/albums/g67/romunov/IMG_3929.jpg

Thanks for confirming. How do I control them? Is there any process to do this? I read that some of the hydroids may not be very good and may turn into a pest anemone later on.