WONDER ROCK has been the premier quality aquarium gravel for over 35 years and is produced exclusively by Kordon for freshwater and marine aquariums, ponds, terrariums and planters. The unique epoxy coatings (both colored and crystal clear) were developed by Kordon for their durability and non-toxicity. WONDER ROCK will not harm any aquatic life (fishes, invertebrates or plants) and is also safe to use with reptiles, amphibians and small animals. WONDER ROCK's processing has removed any potentially harmful debris and metals.

WONDER ROCK products include natural water-worn large and small Pebbles in variegated colors, clear-coated as Beach Pebbles, and Dolomette, which is dolomite in bright solid colors.

Kordon's Pebble Rock is a hard, naturally occurring sea-worn basaltic gravel that does not affect the water's chemistry. Kordon's dolomite is mined and is a relatively soft rock which is composed of over 99% carbonates (approximately 56% calcium and 43% magnesium). It is totally free of toxic contaminants and exerts a slight buffering effect which is beneficial to aquariums. The Pebble Rock and Flourescents are color coated. The Beaches are clear glossy coated. All Wonder Rock is delivered in colorful, heavy duty PVC bags and is available in the following sizes: 2.2 lb (1 kg), 5 lb (2.3 kg), 10 lb (4.6 kg) and 25 lb (11.5 kg).