Rolf C. Hagen (USA) Corp.'s Fluval Flora Accessories are designed to work with the company's 8-gal. Fluval Flora aquarium setup. The dedicated accessories include a substrate, Fluval Plant Stratum, designed to support plant growth, and the Fluval CO2 Kit, designed to provide planted tanks with a necessary carbon source. The substrate features a non-compacting porous structure and is available in 4.4 lb., 8.8 lb. and 17.6 lb. bags, the manufacturer states. The CO2 Kits are available in two sizes, with the smaller size designed to accommodate tanks up to 15-gal., and the larger size designed to accommodate tanks from 15- to 40-gal. Both kits include a regulator valve, cartridge bracket, disposable CO2 cartridge, hose and a CO2 diffuser, and the larger kit also comes with a pressure gauge and a bubble counter.