Aquarium substrate types

This aquarium substrate uses baked soil granules that hold nutrients and pull pH down. Most aquasoils leach ammonia for the first weeks.

They go under a cap, never on their own.

Inert, porous and cheap. They hold no nutrients, so root feeders want tabs.

Fine and inert. Easiest on fish that sift the substrate, hardest for carpets to root in.

Inert and coarse. Debris falls into it rather than sitting on top of it.

Garden soil under a cap. Cheap and long-lived, messy to rescape.

Everything here has one specific job.

Which aquarium substrate supplies nutrients?

Compare aquarium substrate by its nutrient field rather than by color or grain alone. Aquasoil, base layers, sand and gravel serve different purposes. Open the product or material entry to see whether it holds nutrients, requires a cap or needs root fertilization. Match those properties to the plants you intend to grow.

How can aquarium substrate change pH?

Check the buffering field for aquarium substrate: some products lower pH, some raise it, and others have no listed buffering effect. Compare that behavior with your intended livestock and source water. The category filter helps narrow the list, but the individual entry explains the product-specific information.

What grain size should aquarium substrate have?

Aquarium substrate entries show grain size where recorded. Compare it with your planting approach and the animals that interact with the bottom. A fine sand and a coarse gravel are different materials even when both are inert. Check the measured range on the entry instead of estimating it from the thumbnail.

What should I check before adding aquarium substrate?

Before using aquarium substrate, check initial ammonia release, preparation and whether another layer must cover it. Those fields vary between products. Set the substrate and depth in the planner alongside the tank dimensions so the usable water depth and the space available for plants reflect the setup you intend to build.