Build a ph doser/controller - under $100 - tutorial

[mountainman]

Oh, the buffered solution for calibration? I'm not certain, I just used my own that comes from bottles that lasts forever as far as I know.

[jvanvark]

How could you adapt this for a swimming pool...? I have a salt/chlorine generator and the side effect is that you constantly need to add acid to keep the ph correct...

Seems like you would need to keep the flow very low - as you would want like 1/2 gallon per 5 or 6 hours max to be added...

Lots of people are facing this issue as salt generators are the hot thing for new pools -- much lower maintenance etc -- but this would be one step even better!!!

Great idea...!!!

[mountainman]

Just hookup a bigger pump if you need to :-)

[hazeywonder]

if you dont like the idea of using a pump like that you can use a pump like this and run it right out of the bottle. You can find them for about 60 bucks this one is 75 but its on the money.. nice things about this is that the solution never touches any kind of anything just the inside of the tube.
http://www.automatedaquariums.com/dp_sys.htm they have premade ones with tds controllers too you can get it wired up for 2 pumps if you us an 2 part...

[Gen]

hi mountain. I never did build that automatic ph system. I am using CO2 instead. It's the bomb. No more chemical nutes for me. Thanks for the info.

[hazeywonder]

gen,

do you use the controller with a bottled tank of co2 like for fish to keep your ph down. I have been thinking of this but wonder if the co2 takes the place of the o2 in the water. I run connected dwc with air stones so I get lots of air but I always wondered if it was a problem. I mean they use it for fishes where they have to breath.. anyways how long have you been running this co2 system? and a little bit more tech side what happens to the co2 i know plants dont use it in their roots like they do under their leafs but is it convereted or does it escape as it passes thought the water and exit as co2 gas?
thanks