Glass CO2 Check Valve – Red – Freshwater Planted Aquarium, ADA Style – MC Aquascaping Supply

If you’re running a pressurized CO2 system on your planted tank, you absolutely need a check valve to keep water from backing up into your regulator.

This one’s not just functional, it’s also pretty.

It’s a little red glass check valve from MC Aquascaping Supply, and it’s got that clean, minimalist look that fits right in with ADA-style hardscape tanks.

It’s totally transparent, so you can see if any water is getting in there, and it’s made of glass so it won’t degrade over time like plastic ones can.

Just pop it into your CO2 line between the bubble counter and the diffuser.

It’s a simple piece, but it saves you a major headache.

New old stock, made in China, and it does exactly what it’s supposed to.

Small part, big peace of mind.