Today, we prepared the gravel. We put in I think, half an inch of gravel in the glass jar. Then we pour out the gravel in a bucket. then we put in a 1/5 of water to wash the gravel. Once the waters cloudy, you pour the water out but not the gravel. Then do the same thing until it is not cloudy. then you pour the water back into the vase. and that`s how you prepare the gravel for an opae`ula habitat.
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