Seachem Onyx Sand Freshwater Substrate - 15lb Hybrid Lighting 7 L cup provides practical

7 L cup provides practical capacity for larger systems

VarioS CR220 Features

and all-in-one setups where filtration and lighting are built into the aquarium design

usually no more than once every two to three weeks

or awkward algae patches

Seachem Onyx Sand Freshwater Substrate - 15lb Hybrid Lighting 7 L cup provides practicalSeachem 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