Tropic Eden Reef Flakes Back in STOCK We just received our shipment of Tropic Eden Reef Flakes, the most popular reef sand substrate. We also received 2 new products. Meso Flakes which is smaller then Reef Flakes but larger then Mini Flakes. Also, Tonga Mini Flakes, which is roughly same size as Mini with pink flakes added for accent. Both new versions are available in 30lb dry or 20lb live.