Will my amorous nerites stop laying eggs if I separate them?

[Irksome]

My two snails are getting busy, all the time. They give piggy backs all day long. If I separate them will they stop laying hundreds of eggs? I’m assuming they are male and female, is there a way of sexing them? Would the top snail be the male one? Would two females behave like this? Has anyone taken eggs from a freshwater tank and successfully raised them in a brackish water tank?

 

[seangee]

No. One on its own will still lay eggs - but they won't be fertile