Green Leaf Aquariums builds and assembles its regulators in Gainesville, Florida, using pneumatic grade components rather than repackaged generic parts. The compact GRO is a single stage unit for one tank; the higher tiers move to dual stage bodies for keepers who want steady pressure to the last few hundred psi. GLA CO2 regulators carry a limited lifetime warranty against defects for the original owner, and the shop also sells cylinders, diffusers, drop checkers and fertilisers, so a whole system arrives from one place.
A sensible pick for planted tank owners in the States who want a serviceable unit and a human on the other end of a support ticket. The warranty does not cover units taken apart, over tightened with a wrench or wired up wrong. Shipping abroad is limited, and prices sit above mass market kits.
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