Anyone who has been in the hobby for a while may remember the marine substrate i think by red sea called reefbase. Basically a sand with rounded oolites, very smooth and relatively coarse, maybe 1-2mm per piece. Im trying to find something like that which is inert for my substrate change. Any reccomendations? Ive heard a lot about different sands and how they act like little daggers, anyone try pool filter sand? What is the smoothest?
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