Ultum Nature Systems Controbase – Nutrient-Rich Aquarium Substrate for Live Plants, Fish Tank Aqua Soil for Planted Aquarium, Aquascaping - Aquarium Base Layer, Fertilizing Substrate - 8L, 9.7LB

Nutrient-Enriched Freshwater Aquarium Substrate with Pumice Stone for Plant Health – UNS fish tank gravel rocks infused with slow-releasing nitrogen, potassium, phosphorus, and trace elements, Controbase continuously nourishes live aquatic plants and regulates excess nutrients.

Optimal Base Layer Aquarium Substrate for Live Plants and Aquascaping Stability – Designed to be placed beneath Aqua Soil, Controbase prevents excessive aquarium soil disturbance, improves substrate stability, and supports plant roots for long-term growth.

Enhances Water Flow and Beneficial Bacteria Growth – The aquatic plant substrate aquarium gravel 6-8mm porous granules promote oxygen exchange and water circulation, enriching aqua soil for planted aquariums, and creating a thriving environment for root-feeding plants and biological filtration.

Ideal aquarium soil for a freshwater tank. Designed exclusively for freshwater planted aquariums. Controbase layer of nutrient-rich substrate for aquarium plants provides an alternative to a cap layer of gravel or aquarium sand for freshwater tanks capping an aquasoil, preventing from clouding the water, and providing root support for plants. Not suitable for saltwater environments.

Pre-Bagged Substrate Mesh Packs for Custom Aquascaping Layouts – Controbase substrate for aquariums comes in 0.5L mesh filter bags for easy substrate barrier placement, stacking, and slope creation, allowing the best precise control over the soil for aquascaping designs.

Compatible with UNS Controsoil and Controsand – Works seamlessly under UNS Controsoil - aquarium soil for nutrient-demanding plants or with UNS Controsand - sand for fish tank balanced, structured aquascape.