10 Best Aquarium Substrate of December 2025

• Fluval Stratum is made of mineral rich volcanic soil
• Stimulates strong aquarium plant growth
• Promotes neutral to mildly acidic pH
• Suitable for live plants or shrimp
• 4.4 lb bag

Fluval

• This product is easy to use
• This product adds a great Value
• This product is Manufactured in United States

Seachem

• Solid black gravel
• Use as substrate or accent
• 5 pound bag

GloFish

• Rinse right in the bag
• All natural Porous clay
• For Planted Aquarium
• No laterite needed

Seachem

• Complete substrate for freshwater planted aquariums
• Contains major and minor trace elements to nourish aquarium plants
• Substrate encourages healthy plant root growth

Carib Sea

• Triple washed
• Pure natural gravel
• Unique to new Zealand
• 2-4mm

Pisces

• This product is easy to use
• This product adds a great Value
• This product is Manufactured in United States

Seachem

• GRAVEL: Seachem Flourite Black 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.
• AQUARIUM BED: Gravel modifiers such as laterite are not necessary when using Seachem Flourite Black as this product is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels.
• SET-UP: When adding water to the aquarium, fill slowly to avoid disturbing Flourite Black substrate bed. Place a bowl in the aquarium and add water directly to the bowl, allowing water to overflow softly on to the gravel bed. Initial cloudiness is normal, but to remove this simply use mechanical filtration
• COMPATIBLE: Flourite Black substrates will work fine with an under gravel filter and will not soften or decompose to an unsuitable state within your tank.Flourite substrates will work fine with an UGF
• SAFETY: Seachem Flourite Black is not chemically coated or treated, thus does not alter the pH of the water. Flourite Black is beneficial for the life of the aquarium and need not be replaced.

Seachem

• No laterite needed
• Perfect for planted aquariums
• May be mixed with other gravels
• The Premium Substrate For the Planted Aquarium

Seachem

• Triple washed
• Pure natural gravel
• Unique to new Zealand
• 2-4mm

Pisces