 | PREIS Bora-Bora Sand is an extremely fine white substrate of calcium and magnesium compounds that is ideal for sea water aquaria. We recommend a depth of 2 - 3 cm. At this depth and with an adequate flow of water, detritus can be expelled and nitrate deposits are avoided in the aquarium substrate.
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 | Seachem Meridian is an all natural oolitic (spherical or egg shaped) aragonite substrate for all reef and marine aquaria. Seachem Meridian is the premium aragonite substrate for the reef aquaria. It's grain size (a fairly uniform 0.25 - 0.50 mm) is ideally suited to reef inhabitants and it's chemical composition will assist in stabilizing calcium and alkalinity while preventing large pH declines.
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 | Aqua Medic Bali Sand is a very fine aquarium gravel from high quality. Suitable for all mareine water aquariums. Aqua Medic Bali Sand is very white and gives a good contrast in the aquarium.
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 | Tonga Pearls are a completely new and thus a unique lime material, produced under quality controlled conditions, its composition and crystal structure corresponds to natural coral sand. Due to its texture and very white appearance, Tonga Pearls is ideal as a substrate in saltwater aquaria.
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 | PREIS Dark Caribic Sand is a pure rock material with a high percentage of calcium and magnesium. The dark beaches of northern Martinique are especially mystical and fascinating. Thanks to the PREIS Dark Caribic Sand, the colors of the corals and fish become even more brilliant to the eye.
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