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Old 23-05-2016, 08:51 PM   #16
Rein-Biotech Services

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Join Date: Aug 2009
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Quote:
Originally Posted by canopy View Post
Can the bio sand used as gravel? Does it has an expiry date for replacement?
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.
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