Can I overdose CO2 on my tank?

**67chevelle** · 10-22-2012, 8:06 PM

With the proper lighting,substrate, ferts, combined with pressurized CO2, this alone should give you good growth. Highlight tanks will get a inch or more growth in a day.

**Raithan Ellis** · 10-22-2012, 8:11 PM

Originally Posted by chinnp

Milwaukee SMS122

I use the identical controller... the 122 designed specifically for CO2 use. Have you tried it yet? You can manually adjust the pH threshold with the dial and use a night light or lamp in the AC socket to see when it triggers, if you wish to confirm.

Perhaps it's just a typographical error in what you are reading... the following PDF on their website states:
"active when measurement is higher than set point (5A max)" in regards to the pH triggered AC socket.

http://www.milwaukeetesters.com/pdf/...22-510-125.pdf

Note how the 510 and 125 models state the inverse.

**chinnp** · 10-23-2012, 5:38 PM

I just tested it and it works how the instructions describe. PH in my tank at the moment is 6.7. So I set the dial all the way to the left so it was in the 4s and plugged in a lamp. The lamp came on. I then turned the dial to the right. When it passed 6.7, the lamp went out. So, if this was my tank, the PH would only come on when the PH rose above a certain level.

**Raithan Ellis** · 10-23-2012, 5:54 PM

Well, it does sound to be backwards for any documentation that I can find on the SMS122. *shrug*

That said, you can always use a relay to invert the effect of your unit, so off becomes on and vice versa... so hope is not lost.

**Raithan Ellis** · 10-23-2012, 5:59 PM

A quick search yielded what appears to be relevant information. Seemingly, Milwaukee could reverse wire some units (on request?), which may mean it is as simple as either a jumper, a wire swap or? I'll see if I can get time to open mine and advise you on the change needed.

This was a thread I found over on RC.

http://www.reefcentral.com/forums/sh....php?t=2161157

**Raithan Ellis** · 10-23-2012, 6:06 PM

Found it!

Check posts 12, 16, 17 and 19 in the following RC thread for instructions:

http://www.reefcentral.org/forums/sh...php?p=12529194

**chinnp** · 10-23-2012, 6:35 PM

Originally Posted by Raithan Ellis

Found it!

Check posts 12, 16, 17 and 19 in the following RC thread for instructions:

http://www.reefcentral.org/forums/sh...php?p=12529194

Oooooh. I get to take a $100 device apart with a screwdriver? Sweet. I was looking for an excuse.

Dang it. Read the post. I may be able to find someone who's hand w/a soldering iron at work.