Current Culture 2-Site Multi-Mod Expansion Kit for Under Current XL13 with One-Site Lids (1 x 8" Net Pot) Plant Supplements & Additives They will bind to minerals

They will bind to minerals

Excellent for home/hobby use

Can be used as a replacement burner or as an expansion burner for other natural gas CO2 generators

The units are made from high-quality stainless steel and have a thermoregulated cover plate to avoid condensation and build-up of ice

Rugged stainless steel reinforced PTFE stirrer with anchored agitator

Current Culture 2-Site Multi-Mod Expansion Kit for Under Current XL13 with One-Site Lids (1 x 8" Net Pot) Plant Supplements & Additives They will bind to mineralsIncrease The Number of Growth Modules On Your Under Current XL13 With This Expansion Kit From Current Culture! All Expansion Kits Now Include: Multi Mod Growth Module, Aeration Manifold Fittings, and Air Hose Whips. NOTE: This multi mod expansion kit is designed to be used to expand the new 2019 multi mod under current systems. This expansion kit will NOT work with the classic systems. If you are looking to expand an old classic under current systems,