17.5x6.8cm High quality quartz sand processed at high temperatures. It is 20-25 times more effective than basic ceramic. Contain many kinds of trace elements like potassium, sodium, calcium and magnesium to create beneficial bacteria in the best conditions
17.5×6.8cm
High quality quartz sand processed at high temperatures. It is 20-25 times more effective than basic ceramic. Contain many kinds of trace elements like potassium, sodium, calcium and magnesium to create beneficial bacteria in the best conditions.
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