Hanna CO2 kit sale - $42 off today and tomorrow only!

[Koan]

Apparently Earth Day is a deeply meaningful holiday in the world of industrial testing?

Use code EARTH15 for $10 off the CO2 kit and $32 off shipping April 29th and 30th!

 

[Naturescapes_Rocco]

If I didn't already have two, I would take advantage of this lol

 

[Phish Tank]

FYI I ordered mine at the sale April 29, and it just arrived today (18 days later). Still figuring out how to best read a verrrry faint pink, but I'm looking forward to trying it out a few times during the day to see how early to start co2 in the morning.

 

[BenB]

FYI I ordered mine at the sale April 29, and it just arrived today (18 days later). Still figuring out how to best read a verrrry faint pink, but I'm looking forward to trying it out a few times during the day to see how early to start co2 in the morning.

I have a different CO2 kit that works the same. I've been taking it to a window and holding a white piece of printer paper behind it. Its still a bit tough, but I think I have it figured out.

I did tests yesterday as my lights were ramping up. My CO2 was 35 when the light came on and before it started its ramp. Today I dialed the CO2 back a little. It seems I dialed the wrong way. It never got the pink. Frustrating when you're still not 100% confident with doing the test.