Side-by-side equipment comparison

Aragonite Sand vs Silica Sand

Aragonite Sand vs Silica Sand side-by-side comparison. Pros, cons, when to pick each, and recommended setups for each tank type.

Aragonite Sand (CaribSea)

Pros

Buffers pH 8.0-8.4 naturally
Provides calcium + alkalinity
Coralline algae attaches readily
Sand-sifting fish eat without grit damage
Looks tropical-reef natural

Cons

Expensive ($25-50 per 20-lb bag)
Dust during initial fill
Releases trapped phosphate when disturbed
Some grades crumble over time

Silica (Pool Filter or Play Sand)

Pros

Cheap ($5-15 per 50-lb bag)
Inert (no parameter changes)
Available at hardware stores
Range of grain sizes available

Cons

No pH buffering
Wrong chemistry for saltwater (NEVER use)
Some play sand contains contaminants
Looks less natural in display

Which to pick (by use case)

Use case	Recommended
Saltwater / reef	Aragonite (CaribSea Special Grade Reef)
African cichlid (Lake Malawi/Tanganyika)	Aragonite
Planted freshwater	Silica or inert sand
Goldfish / coldwater	Silica
Discus + soft-water tetras	Silica or fluval Stratum (NOT aragonite - raises pH)

Frequently asked questions

Aragonite Sand vs Silica Sand: which is better for Saltwater / reef?

Aragonite (CaribSea Special Grade Reef). Use case Recommended Saltwater / reef Aragonite (CaribSea Special Grade Reef) African cichlid (Lake Malawi/Tanganyika) Aragonite Planted freshwater Silica or inert sand Goldfish / coldwater Silica Discus + soft-water tetras Silica or fluval Stratum (NOT aragonite - raises pH).

Aragonite Sand vs Silica Sand: which is better for African cichlid (Lake Malawi/Tanganyika)?

Aragonite. Use case Recommended Saltwater / reef Aragonite (CaribSea Special Grade Reef) African cichlid (Lake Malawi/Tanganyika) Aragonite Planted freshwater Silica or inert sand Goldfish / coldwater Silica Discus + soft-water tetras Silica or fluval Stratum (NOT aragonite - raises pH).

Aragonite Sand vs Silica Sand: which is better for Planted freshwater?

Silica or inert sand. Use case Recommended Saltwater / reef Aragonite (CaribSea Special Grade Reef) African cichlid (Lake Malawi/Tanganyika) Aragonite Planted freshwater Silica or inert sand Goldfish / coldwater Silica Discus + soft-water tetras Silica or fluval Stratum (NOT aragonite - raises pH).

Aragonite Sand vs Silica Sand: which is better for Goldfish / coldwater?

Silica. Use case Recommended Saltwater / reef Aragonite (CaribSea Special Grade Reef) African cichlid (Lake Malawi/Tanganyika) Aragonite Planted freshwater Silica or inert sand Goldfish / coldwater Silica Discus + soft-water tetras Silica or fluval Stratum (NOT aragonite - raises pH).

Aragonite Sand vs Silica Sand: which is better for Discus + soft-water tetras?

Silica or fluval Stratum (NOT aragonite - raises pH). Use case Recommended Saltwater / reef Aragonite (CaribSea Special Grade Reef) African cichlid (Lake Malawi/Tanganyika) Aragonite Planted freshwater Silica or inert sand Goldfish / coldwater Silica Discus + soft-water tetras Silica or fluval Stratum (NOT aragonite - raises pH).

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