Is this thing good or bad?

[Tahoe61]

Tahoe do you think it really could be vermetid snail. I pulled it out of the water it looks like a slug with two antennas

A slug with two antenna can be a Stomatella, good guy or a nudibranch, need more info.:)

I see two potential Vermetids in post #11.

 

[Michael Calise]

Finally got a better picture

 

[Lionfish Lair]

Yes, it's a stomie.

 

[Michael Calise]

Thank you very much @Lionfish Lair @Tahoe61 .

 

[cdmckinzie]

I am new to the hobby but I can't see anything in any of your pics, they just look like a bunch of rocks. Maybe if you could take a closer pic of exactly what you were talking about it would help the experts and it would help us idiots know what to look for in our own tanks. Thank!

 

[Michael Calise]

Well I apologize its what I have to work with and it's smaller then my fingernail. It also doesn't come out often. But I appreciate your constructive criticism.

 

[cdmckinzie]

I'm sorry I don't mean to criticise at all, I don't have the experience to do so, I was just hoping to see what you were talking about so I could learn from you. Thank you for the info.

 

[MicroPico]

Collonista snail ^^^ Sundial snail ^^^

Also, another defining difference between these two snail types is the trap door that seals them inside. The collonista has a regular door but a sundial has an odd triangular shaped door that looks strangely out of place as a trap door.