Scale or Pressure

Request new hardware or ideas for the controller

Posts: 123
Joined: Thu Sep 19, 2013 7:46 am
Location: Saint Cloud, FL
PostPosted: Tue Nov 17, 2015 7:33 pm
Any way to have a scale to measure my CO2 tank? Especially for us with calcium reactors? Worst case is run out of CO2 and crash tank for low ALK.

I know $$$ but could save $1000 in dead coral

How about pressure monitor? Could use to see when tank is near empty. Will start to see pressure drop on tank and give a few days warning when tank is almost empty
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Joined: Fri Mar 18, 2011 6:47 pm
PostPosted: Tue Nov 17, 2015 8:03 pm
I can make you a custom water level expansion module that could measure the psi of your CO2 tank :)
Roberto.
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Joined: Fri Jul 20, 2012 9:42 am
PostPosted: Tue Nov 17, 2015 8:29 pm
How would that connect? You'd need a tee in the airline? That's an awesome idea. I don't run a reactor..but for those that do, this would be so good.

Posts: 12276
Joined: Fri Mar 18, 2011 6:47 pm
PostPosted: Tue Nov 17, 2015 8:33 pm
Yeah, use a T on the airline.
Roberto.
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PostPosted: Wed Nov 18, 2015 6:47 am
Just curious, what would you have to mod to do that? I figured you could change the gain in software like we've done for longer pipes.

What would be cool would be this, plus the ph expansion plus a co2 regulator and have an all in one carbon reactor kit. AlanM built a pwm solenoid I believe that could be used. Let me see if I could dig up the link.
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PostPosted: Wed Nov 18, 2015 6:50 am
Here, check this out.

http://wamas.org/forums/topic/65104-diy ... ntry579900

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Joined: Wed Jan 01, 2014 7:26 am
PostPosted: Wed Nov 18, 2015 2:04 pm
I do have a little Arduino-driven mouse solenoid device. It currently has 4 channels and can use a potentiometer or 0-10V input to pulse a little 10ms bubble out of the mouse solenoid, which is inline in the low-pressure side of the CO2 tubing. It can go from 2 minutes per bubble to 2 bubbles per second. I was basically trying to see if I could make a controllable version of one of those CarbonDoser things for a few dollars.

The goal is listening to a pH probe and dynamically adjusting the bubble rate. With the pressure sensor on the low pressure line it would close the loop with controlling the thing, I think.

Posts: 123
Joined: Thu Sep 19, 2013 7:46 am
Location: Saint Cloud, FL
PostPosted: Wed Nov 18, 2015 2:29 pm
Hey that would be awesome, my Aquarium Plants Bubble Controller was $299.00 If it comes near that price point I am in on one of those.

The first stage on the CO2 Regulator at max fill is 1000 psi. That would be the pressure I would want to measure. When this starts to go down then I know my CO2 is near empty. I do not need an absolute measure on the Pressure just an indication when there is a downward trend. Would a pressure transducer be a better fit? Could tee or replace the first stage gauge. I am not putting a 1/4" tube or any tubing on that side and hooking to the current water level sensor. Asking for some serious problems.
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Posts: 123
Joined: Thu Sep 19, 2013 7:46 am
Location: Saint Cloud, FL
PostPosted: Wed Nov 18, 2015 2:34 pm
lnevo wrote:Just curious, what would you have to mod to do that? I figured you could change the gain in software like we've done for longer pipes.

What would be cool would be this, plus the ph expansion plus a co2 regulator and have an all in one carbon reactor kit. AlanM built a pwm solenoid I believe that could be used. Let me see if I could dig up the link.


I would buy this! This is a major failure point in my system that keeps me up at night. I lost my entire tank in an ALK spike, due to no CO2. Lost few $1000 in coral.

This is the regulator I am using:

http://www.aquariumplants.com/CarbonDos ... _p/co2.htm

Would it be possible to get a peristalic pump as well to feed the reactor? Would have to be continuous duty.
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Joined: Fri Mar 18, 2011 6:47 pm
PostPosted: Wed Nov 18, 2015 3:55 pm
1000psi?
That seems a bit excessive.
Are you sure it is not 100psi?
Roberto.
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