Chihiros grew up making aquascaping lights and brought the same app first thinking to CO2. The Regulator Mate combines a solenoid, gauge, bubble counter and check valve with Bluetooth control, so injection schedules live in the phone instead of a mechanical timer. The Pressure Regulator PRO takes the other route: a solid metal body with extension blocks, up to four of them, letting one cylinder run four aquariums with separate needle valves. Pricing undercuts the European premium brands noticeably.
A good fit for keepers who already run Chihiros lighting through the app and like everything on one dashboard. Those who distrust wireless control of a gas valve should stay with a plain solenoid and a wall timer. Spare parts and warranty work go through regional dealers, which can mean a long wait.
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