just ordered some tropical springtail from joshs last week to seed my tank. I am not sure if it's just me or all their culture only contains a little amount. i add water in and jog it a little so they all flow to the surface, only count to about 30 something.(the box was partly wet when I received it even the tape on the culture were still tie, not really sure if it's leaking or just the post office spill some water on there.)

for that amount I am wondering how long do they usually take to establish in a 20L, or do i have to try to buy another one from some other place.