Patience
Stability (calcium/mag/strontium/trace elements all seem to be applicable)
Luck
Lack of Predators
Really no "magic recipe" or "easy button" beyond that..
On some tanks it grows like crazy.. Some never get any..
Hasn't been any proven/repeatable/concrete evidence or methods to get it to grow like mad.. What works for one isn't guaranteed to work for another..
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Who me?
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