Nautilus Tan – Rift Lake-Inspired Substrate with Natural Shells

Inspired by the iconic Great Rift Lakes of Africa, Nautilus Tan is a natural Riverbed substrate composed of earthy-colored sands, gravels, and variously sized shells. Designed to replicate the intricate lakebed environments of places like Lake Tanganyika and Lake Malawi, this substrate brings both visual realism and functional value to your aquarium or terrarium.

Description

The Great Rift Lakes are among the most biodiverse freshwater ecosystems on Earth, home to unique species and complex habitats. Nautilus Tan captures this richness with a natural blend of tan-toned sands, gravel, and crushed shells—ideal for recreating lake biotopes, estuarine settings, and even marine-influenced aquaria.

The inclusion of natural shells does more than elevate the visual authenticity—they serve as functional habitat features. Many fish species, such as shell-dwelling cichlids, use shells for breeding, protection, or territory building. The combination of textures also encourages foraging behavior and adds microhabitats to your setup.

Perfect on its own or when combined with the Shell Shelter enrichment series (Normal and XL), Nautilus Tan is a versatile and enriching choice for aquascaping enthusiasts who want to bring the complexity of natural ecosystems into their tanks.

Key Features

• Inspired by the lakebeds of the African Rift Valley (e.g. Lake Tanganyika, Lake Malawi)

• Blend of natural tan sands, gravels, and assorted shells

• Adds texture, contrast, and habitat complexity

• Supports shell-dwelling and substrate-interacting fish species

• Works beautifully in lake, estuarine, or marine-style aquariums and terrariums

• Made with 100% natural, non-toxic materials

• Compatible with Shell Shelter enrichment products

• Slightly increases water hardness (ideal for many Rift Lake species)

Characteristics

• Color: Tan, with warm earthy tones

• Material: Natural sands, gravels, and shells

• Grain Size: 0.1 – 5 cm

• Water Chemistry: Slightly hardens water—beneficial for Rift Lake species

• Packaging: Available in 2 kg and 5 kg bags

• Safety: Inert, non-toxic, safe for fish, shrimp, and other aquatic animals

Usage Instructions

• Pre-washed and ready to use — rinsing optional

• Gently pour water onto a hard surface or décor to avoid disturbing the substrate during tank setup

• Remove any floating particles with a fine net after filling

• Can be used as a standalone Riverbed or combined with other sands and gravels for added complexity

• Random distribution of particles and shells creates a natural lakebed appearance with minimal effort

Design Tip

Pair Nautilus Tan with rockwork, driftwood, and fish species from the Great Rift Lakes for a regionally authentic aquascape. Ideal companions include shell-dwelling cichlids and sand sifters who will benefit directly from the functional shell content.

Bring the depth and richness of Africa’s Great Rift Lakes into your aquascape with Nautilus Tan—where beauty meets biotope realism.