snails with other snails

So I have a planted 15 gallon tank with many old freshwater fish and a few mystery snails. But I currently have maybe 10-15 of the most tiny sand colored snails hanging around. Some hitch hiking then dropping off the mystery snails but not bothering anything. Does anyone know what kind they...

Ok, everyone has all different says about different snails. I wanted to know, what snails are able to be together & cohabitant in 10 ga & 15 ga tanks. I understand the MTS breed like crazy so dont want them. what does everyone recommend - I have 6 apple snails each in its 2 gallon - can I...