Seachem Onyx Sand Freshwater Substrate - 15lb LED This cosmopolitan floating fern adds

This cosmopolitan floating fern adds decorative surface cover

For outdoor installations

Hanna Low Range Nitrate Checker

5 ml per 80 L (20 US gallons) once or twice weekly

Seachem Onyx Sand Freshwater Substrate - 15lb LED This cosmopolitan floating fern addsSeachem Onyx Sand Freshwater Substrate 15lb Seachem Onyx Sand Freshwater Substrate 15lb is a naturally dark gray carbonate rich sand for planted aquariums, designed to support KH levels while providing a long lasting natural substrate bed. Seachem Onyx Sand for Planted Aquarium KH Support Onyx Sand is suited to freshwater planted aquariums where a dark natural substrate and carbonate rich composition are preferred. Unlike the Flourite substrates, Onyx