For the latest couple of months I have done some automatic pH-measurements in my tank. I use an own built pH-controller/meter. It has a serial PC-interface which I can use to see how the CO2 is changes due to different conditions/parameters 24 h/day. It is a great tool to gain knowledge of the CO2 level in planted tanks. Of course, it can run as an ordinary controller as well. The housing is a $5 modified timer and the PCB is home built with a $2 micro controller as the hart of the system:
http://193.12.137.241/bluesboy/viewimage.php?id=205
http://193.12.137.241/bluesboy/viewimage.php?id=209
The pH-value and the status of the solenoid valve is stored on my web sever at regular basis 24h per day with a client-server solution. This is how the result could look like if I select one day:
http://193.12.137.241/bluesboy/pHplott.php?t=2004-12-25
The black line is pH-level and the red is the solenoid valve (on=7, off=6).
Recently I found out how much the (surface) water circulation is affecting the CO2-level:
http://193.12.137.241/bluesboy/aquabase/plottlinks/sum.php
To put some more data to this subject in general, I have just started a very simple survey to see how much CO2 different tanks are consuming. It is quite rough, but it's interesting to see how it can differ. The main input is how long time a known mount of CO2 is lasting (NOT DIY). To be able to compare different set-ups, I have added some extra information as well.
I would be very happy if you could add your parameters in my database to get it more complete. Some Swedish forum members have just started.
http://193.12.137.241/bluesboy/aquabase/consumption/sum.php
Just follow the link "Add new period". Any questions? Just post it here or send me an email.
Thank you in advance.
http://193.12.137.241/bluesboy/viewimage.php?id=205
http://193.12.137.241/bluesboy/viewimage.php?id=209
The pH-value and the status of the solenoid valve is stored on my web sever at regular basis 24h per day with a client-server solution. This is how the result could look like if I select one day:
http://193.12.137.241/bluesboy/pHplott.php?t=2004-12-25
The black line is pH-level and the red is the solenoid valve (on=7, off=6).
Recently I found out how much the (surface) water circulation is affecting the CO2-level:
http://193.12.137.241/bluesboy/aquabase/plottlinks/sum.php
To put some more data to this subject in general, I have just started a very simple survey to see how much CO2 different tanks are consuming. It is quite rough, but it's interesting to see how it can differ. The main input is how long time a known mount of CO2 is lasting (NOT DIY). To be able to compare different set-ups, I have added some extra information as well.
I would be very happy if you could add your parameters in my database to get it more complete. Some Swedish forum members have just started.
http://193.12.137.241/bluesboy/aquabase/consumption/sum.php
Just follow the link "Add new period". Any questions? Just post it here or send me an email.
Thank you in advance.