Baby snails appeared out of nowhere??

[StripySnailGirl04]

Hello,
It's been ages since I've been on TFF but I need some help, i woke up this morning to discover tens of baby snails all different sizes in my fish tank that I haven't noticed before.

Sorry these are really bad images (my phone has terrible focus) but does anyone know what type of snails these might be? I'm really confused as to how they got there because I haven't added anything new to the tank recently and the only 2 other snails I have are nerites.

 

[Colin_T]

Possibly Malaysian livebearing snails (aka Malaysian trumpet snails). If they are, they are the worst snail to get and nearly impossible to kill. They live in the gravel and hide during the day and come out at night. The only way to kill them is to add copper to the tank for a few weeks to take them out. Even then it doesn't always kill them all because they close their operculum and sit there waiting for the copper to be removed, then carry on breeding.

 

[StripySnailGirl04]

Possibly Malaysian livebearing snails (aka Malaysian trumpet snails). If they are, they are the worst snail to get and nearly impossible to kill. They live in the gravel and hide during the day and come out at night. The only way to kill them is to add copper to the tank for a few weeks to take them out. Even then it doesn't always kill them all because they close their operculum and sit there waiting for the copper to be removed, then carry on breeding.

That's what I considered but aren't MTS livebearers? I'm not aware of any adult MTS snail that is in my fish tank, neither have I added anything new recently. The only thing I've done was move around some things in my fish tank a couple of days back.