Seachem Flourite Black Sand 3.5kg
Flourite Black Sand is a specially fracted stable porous clay gravel for the natural planted aquarium. Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment. Flourite Black Sand is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Flourite Black Sand is not chemically coated or treated and will not alter the pH of the water. Flourite Black Sand is good for the life of the aquarium and need not be replaced. To determine the number of bags required for your aquarium, please note that each bag (7 kg, 15.4 lbs) occupies a volume of approximately 5500 cm3 (320 cu. in.). To determine your desired volume multiply tank width by length by desired depth.
Flourite Black Sand is a specially fracted stable porous clay gravel for the natural planted aquarium. Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment. Flourite Black Sand is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Flourite Black Sand is not chemically coated or treated and will not alter the pH of the water. Flourite Black Sand is good for the life of the aquarium and need not be replaced. To determine the number of bags required for your aquarium, please note that each bag (7 kg, 15.4 lbs) occupies a volume of approximately 5500 cm3 (320 cu. in.). To determine your desired volume multiply tank width by length by desired depth.
Flourite Black Sand is a specially fracted stable porous clay gravel for the natural planted aquarium. Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment. Flourite Black Sand is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Flourite Black Sand is not chemically coated or treated and will not alter the pH of the water. Flourite Black Sand is good for the life of the aquarium and need not be replaced. To determine the number of bags required for your aquarium, please note that each bag (7 kg, 15.4 lbs) occupies a volume of approximately 5500 cm3 (320 cu. in.). To determine your desired volume multiply tank width by length by desired depth.
Flourite Black Sand is a specially fracted stable porous clay gravel for the natural planted aquarium. Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment. Flourite Black Sand is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Flourite Black Sand is not chemically coated or treated and will not alter the pH of the water. Flourite Black Sand is good for the life of the aquarium and need not be replaced. To determine the number of bags required for your aquarium, please note that each bag (7 kg, 15.4 lbs) occupies a volume of approximately 5500 cm3 (320 cu. in.). To determine your desired volume multiply tank width by length by desired depth.
in 36 offers
The lowest price for Seachem Flourite Black Sand 3.5kg right now is $26.00 at Oasis Aquarium, compared across 22 retailers.
The all-time low was $14.75 on 18 July 2025 — today's price is 76% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 24 Aug 2026.
Last updated at 24/08/2026 19:28:26
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Seachem Flourite Black Sand 3.5kg
Delivery between 27 Aug – 3 Sept $12.50
Seachem Flourite Black Sand 3.5kg
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Seachem Substrate - Flourite Black Sand 3.5kg
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Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
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Delivery $9.99
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
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Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
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Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Fluorite Natural Sand (sc3523)
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Fluorite Natural Sand (sc3523)
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
| Country of origin | USA |
| Is discontinued by manufacturer | No |
| Plant or animal product type | Aquarium plants |
| Recommended uses for product | bedding for fresh water aquarium |
| Specific uses for product | Suitable for Fresh Water, For Plant Aquariums |
Seachem Fluorite Natural Sand (SC3523)
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seachem Flourite Black Sand 3.5kg
Delivery between 27 Aug – 3 Sept $12.50
Seachem Flourite Black Sand 3.5kg
Seachem Flourite Black Aquarium Fish Tank Plant Substrate | 3.5kg
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seachem Substrate - Flourite Black Sand 3.5kg
Delivery $15
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
| Country of origin | USA |
| Is discontinued by manufacturer | No |
| Plant or animal product type | Aquarium plants |
| Recommended uses for product | bedding for fresh water aquarium |
| Specific uses for product | Suitable for Fresh Water, For Plant Aquariums |
