Some things I found in my tank

[Xzibit]

There are a few things I am seeing in my tank that I am wondering what are. The first thing is a circular disk there are 3 of them 2 are white in color and the other is tan they are about 1/4 inch in diameter and thin they look almost like a small mushroom. The second are these tiny white bugs on the sides of my glass. There are quite a few of them on any given side they range is size from the tip of a ball point pin to half that or less. they just kinda scoot along the glass and most are too small to see any features. The third thing are little white circles on the glass with what looks to be small tenticles. When I clean the front of the glass they kinda float around the tank and look almost like a small jelly fish. I would take pics of these things but my camera is not that great and I am unable to get a good picture of any of them. So I hope my descriptions are enough. Thanks for your time and Help.


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[benjen]

1) Do the discs look more like a shell or an actual mushroom? Do they move at all?

2) Copepods or baby amphipods. A type of planktonic crustaceans.

3) Probably planktonic cnidarians or similar. Could be jellyfish, hydras, baby corals, or another species that looks like them in the planktonic stage. If you have new live rock or live sand, they can hatch out. I had a bunch on my glass after getting rock and sand. They slowly went away as the powerheads chewed them up.

Neither 2 or 3 is harmful from my experience.

[Xzibit]

The disks dont look like a shell ,they have not moved that I know of. They seem to be attacted to the rock. I have only seen the Tan colored one is a little larger then the other 2 and that one is the only one that I noticed moved and that was only one time and it moved about 3 inches on the rock but has not moved since. I have also seen a couple of things that look like small 1/4 of an inch sticking out of the rock that look to be feather worms but its hard to say for certian. I guess I will see when/if they get bigger. It just amazes me what you find in a tanks when you use LR/LS. Thanks for the info.

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[benjen]

Probably some form of mollusc, echinoderm, or maybe some bleached mushroom corals/button polyps. Not sure.