Oh yes, if I only had a handful to jar, I'd maybe do it.
I say maybe, b/c cleaning out the spawn tank today, I noticed just how much poop java moss holds! Its like instead of on the floor, all the snail poop was stuck to the moss. Very annoying!
BTW, I use gallon jars, I clean them every other to every 3 days. But really if I go every 3 days, I add Prime, b/c I have tested the water and ammonia does show up. I know not all of it is toxic, but still don't like to see it. I wish I could get my hands on the Nh4 (or is the nh3 that's the toxic form, I never remember) test kit