Custom Cones USA Fast Fill 121 Replacement Cartridge, 98mm Cone Algaecides Chelated Calcium prevents and corrects

Chelated Calcium prevents and corrects deficiencies which are caused due to a lack of/or imbalance in the assimilation of Calcium

protecting your plants from negative effects of intense light and heat

does not require expensive ventilation systems and can be placed 1"-2" above the plant canopy which maximizes photo synthetic response

With a high concentration of soluble potash and silica

Custom Cones USA Fast Fill 121 Replacement Cartridge, 98mm Cone Algaecides Chelated Calcium prevents and correctsFast Fill Makes Pre Roll Filling Simple & Easy Wether you're looking to buy extra cartridges to preload your cones, or you're just wanting the ability to pick and choose, Custom Cones has exactly what you need. What makes the Fast Fit 121 great, is that the base units are the same for both the Fast Fit 55 & 21. That means, if you decided to start with the 55, you could easily upgrade by just purchasing 121 cartridges! Or vice versa, say you purchased