The Role of Substrate in Aquariums
Substrate plays a vital role in the living conditions of both animals and plants in an aquarium. It also greatly influences the visual appeal and overall style of the tank—more so than any other product. At Aquael, one of the leading manufacturers of aquarium equipment and accessories in Poland, we understand this deeply. Among our range of substrates, dolomite gravel is a popular choice for tanks housing species that thrive in hard, alkaline water with a high pH.
Dolomite Substrate by Aquael – Key Features
Many beginner aquarists mistakenly assume that substrate only serves an aesthetic purpose. In reality, it significantly affects the biochemical balance and the living conditions within the tank. While most substrates are chemically neutral and do not release minerals or contaminants into the water, not all behave this way.
Some types of substrate, due to their porous structure, provide excellent environments for beneficial bacteria that support a healthy ecosystem. Others, rich in calcium, can drastically raise water hardness and pH—beneficial for some species but potentially lethal to others. There are also substrates that function as filtration media but may release elements unsuitable for fish health.
For this reason, it’s essential to match the substrate to the specific needs of your aquarium’s inhabitants, particularly in terms of water parameters.
What to Avoid When Choosing Aquarium Substrate
Regardless of the species you keep, marine sand and stones containing even trace amounts of metal should never be used in freshwater tanks. These materials pose serious risks, as fish are highly sensitive to toxic substances in the water.
Avoid substrates from unreliable sources, especially dyed or synthetic gravel, which may release harmful compounds into the water over time.
When Dolomite Is the Right Choice
Dolomite gravel is 100% natural and increasingly popular among aquarists, but it is not suitable for all tank types. Dolomite is rich in calcium, which alters water chemistry by significantly increasing hardness and pH levels.
As such, it should only be used in aquariums that house species requiring hard, alkaline water. It is not suitable for planted aquariums. However, it’s ideal for African cichlid tanks, particularly those with fish from Lake Malawi, Lake Tanganyika, and Lake Victoria. In these setups, dolomite stabilises water parameters and improves the aquatic environment.
Aquael’s dolomite gravel is of exceptional purity, free from contaminants that could endanger fish. In contrast, some lesser-known brands may neglect product quality, resulting in substrates that release toxic compounds into the water.
Using Nutrient Substrates Under Dolomite Gravel
Most substrates, including dolomite, are nutrient-poor and sterile. Beginner aquarists often overlook this, missing the opportunity to enhance their tank’s potential. A great practice is to use a nutrient-rich substrate as a base layer beneath the visible dolomite gravel.
These fertilising layers provide essential minerals, encourage strong root growth, support healthy photosynthesis, and in some cases, help prevent algae growth.
Appearance and Aesthetic Options
Aquael’s dolomite gravel is available in a variety of colours, including black, grey, beige, and white. Beige and white are the most popular choices thanks to their versatility and ability to highlight fish and aquascaping elements.
Dolomite gravel comes in small, rounded granules that blend beautifully with all types of aquarium décor. The smooth edges also ensure the safety of bottom-dwelling fish.
Order Aquael Dolomite Gravel Today
Aquael dolomite gravel offers functional benefits, chemical suitability, and aesthetic appeal, making it a fantastic option for hard-water aquariums. It is clean, natural, safe, and compatible with most tank decorations.
Order now through our online store and give your fish the ideal foundation for a healthy and vibrant life.
- Natural substrate
- Dolomite-beige gravel
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Water-neutral
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Creates impressive contrasts in the aquarium
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Very fine grain size: 2 - 4 mm
