Diamond Black Sand is a fine-grained substrate for aquascapes that need a more refined look. These sands are particularly popular for aquariums housing small fish or bottom dwellers.
cichlids
Pisces - Delta Sand Bio Substrate - 5 lb
Aqua Natural Substrates are 100% natural, sustainably sourced, triple-washed, and kiln-dried gravels and sands designed for all aquarium types, including planted tanks. Each product is meticulously graded to provide natural beauty, easy cleaning, and a large surface area for beneficial bacteria.
Select Aqua Natural Bio-Substrates come bio-activated with live nitrifying bacteria, including patented strains of Nitrosomonas and Nitrobacter, which help convert harmful ammonia into nitrates for a healthier aquarium. These live bacteria are harmless to aquatic life and can be used alone or mixed with corresponding dry Aqua Natural substrates to support stable, well-balanced water conditions.
Coarse Aragonite - 10 lb
Pisces USA AquaNatural Coarse Aragonite is a natural calcium carbonate substrate designed for marine and reef aquariums. It helps maintain stable pH and alkalinity (8.0–8.4) while releasing essential minerals that support healthy corals, invertebrates, and select freshwater species. Its porous structure promotes beneficial bacterial growth for enhanced biological filtration, and the coarse grade makes it ideal for high-flow aquarium systems.
Pisces - Delta Sand - 10 lb
Delta Sand is a natural river gravel suited for aquascapes that want to look natural yet elegant. This gravel is ideal for planted tanks and general freshwater setups, providing a natural look and excellent rooting medium for aquatic plants.
Pisces - African Cichlid Aragonite - 10 lb
AquaNatural African Cichlid Aragonite is a natural calcium carbonate substrate designed for freshwater aquariums that benefit from higher pH levels (8.0–8.4). Its high buffering capacity helps stabilize pH and alkalinity while releasing essential minerals to support healthy water chemistry. The porous structure also promotes beneficial bacteria growth, enhancing biological filtration and overall tank health.