White circular discs on rocks & glass?

[kthomas]

I have these white perfect circles on my rock and glass. They are smooth and pretty hard like they are calcified.

I will take pictures this evening after my water change.

Any ideas what they are?

 

[stratman]

I have those pretty often too. About 1/8" across? They are snail eggs, but I couldn't tell you which breed of snail is doing it...

 

[kthomas]

@stratman wrote:

Yeah, that sounds about right ... I figured it was something like that. There are a lot all over various pieces of rock. Have they hatched ? How long do they usually take to hatch?

 

[stratman]

After a couple of weeks the center is gone, and a small white ring is left behind. I couldn't tell you if a snail hatched, or if something ate it. I suspect my flame angel picks at them, but I can't prove it.

Either way, they haven't really ever gotten out of control and will scrub off the glass with a Mag-Float. You do have to get used to seeing them appear, then dissappear on the LR. I also have not had any type of snail population "explosion". I've had dots for 9+ months now with no side effects, so I don't think they're an issue.

 

[kthomas]

thanks