i have java, but most people say it works best with willow. some like taiwan also, but any moss would work.
also, you dont have to use mess with moss inside, it works very well just attaching it to flat peices of slate.
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Eheim Pimp #296 Eheim Ecco 2232 (x2), Eheim Ecco 2234 (x1)
please grow my hatchling (click on it): 
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