Quote:
Originally Posted by canopy
Can the bio sand used as gravel? Does it has an expiry date for replacement?
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Hi Canopy bro, sorry for the late reply! Best Bio Sand is of volcanic makeup, so no expiry & not necessary remove. As for Best sand, it's good for 3 to 6 months, giving the tank enough time to mature. No harm in leaving in the tank. Top up as you wish.