I've tried my hand at moss for the past year or so, and it just won't flourish in my tank. I've got java moss and fissidens. It just doesn't want to attach. It'll grow thick but won't stay down and just makes my tank look like trash. There's a decent amount I'm wanting to get rid of. Pm me if you're interested and we can work something out. Not asking a lot. Maybe 5-10 bucks for a ball of it. Or perhaps if you have a good trade.