ANS PRO II Solenoid replacement

Description

The ANS PRO II Solenoid replacement is a CO2 system component for planted aquariums.

Key Features

• Essential for providing carbon dioxide to aquatic plants
• Promotes healthy and vigorous plant growth
• Compatible with standard CO2 regulator setups

ANS PRO II solenoid replacement for timer-controlled CO2

The solenoid is the electrically operated valve that lets you put CO2 injection on a timer, switching gas off overnight when plants stop photosynthesising and would otherwise let dissolved CO2 climb to dangerous levels. This replacement coil restores that automation if your original sticks, buzzes loudly or stops cutting off cleanly, which is the usual sign a solenoid has worn out after years of daily cycling.

Running CO2 only during the photoperiod also stretches a cylinder considerably, a real saving given local refill trips. Wire it through a simple plug-in timer set to start an hour or two before lights and stop before lights-out. In our warm tanks, where CO2 off-gasses fast and fish are already living near their oxygen comfort zone, a reliable overnight cut-off is genuinely a livestock-safety feature.

See the wider co2-systems range for regulators and tubing. Our solenoid regulator guide and CO2 at night guide explain timing and safe overnight settings.