GLA GRO Paintball CO2 Regulator

Brand: Green Leaf Aquariums

This is the paintball version of the GRO series: a compact single stage regulator assembled in house from high quality pneumatic parts and threaded for paintball style CO2 cylinders. Like the rest of the GRO line it uses GLA's modular manifold, so an extra block can be added later to run a second aquarium independently from the same bottle. Build quality is the selling point, with hobbyists in the store's own reviews rating it above cheaper paintball units.

Aimed at small and mid sized aquascapes where a 20 oz paintball tank fits and a full CGA320 cylinder does not. Two limits to weigh: a paintball bottle needs refilling far more often than a 5 lb tank, and the single stage body calls for attention as the cylinder empties. GLA sells direct rather than through marketplaces, so the store is the place to buy and to get spares.