The Planted Tank Forum - View Single Post - Poor Mans Auto-Dosing

Sietch31 · 03-31-2006, 05:49 PM

Hello,

Jumping in the post, I am currently under testing of the same system !

That a great and simple idea !!!!
But those simple ideas are very often the more difficult to have !
Many thanks to you !!!
Automated dosing and auto top-off at the same time, I could not resist to test !

I am testing with a 1 gallon bottle, air pump and valve for air adjustment to the bottle. I am running the air pump per 1 minute steps and checking amount of water pushed in a scaled container.
I have set my test sytem with the same height/head as it will be when installed on the tank.

I have a question : when in use, the amount of liquid pushed to the tank is less and less each time, due to level going down in the bottle and time needed to build up the pressure....
For instance, if I set the air rate so that in the first minute air will push 270ml to the tank, after 10 times 1 minute (as if it was the tenth day), it will push only 150ml, and on the "20th day", it will push only 80ml (bottle is then almost empty....)

Did you face that problem ?
If yes how did you solve that to obtain a constant quantity of liquid injected ???

Thanks in advance for any thought on this....

03-31-2006, 05:49 PM	#41 (permalink)
Sietch31 Algae Grower (View User Tanks) PTrader: (0/0%) Join Date: Feb 2006 Location: Abu Dhabi, U.A.E. Posts: 87	Hello, Jumping in the post, I am currently under testing of the same system ! That a great and simple idea !!!! But those simple ideas are very often the more difficult to have ! Many thanks to you !!! Automated dosing and auto top-off at the same time, I could not resist to test ! I am testing with a 1 gallon bottle, air pump and valve for air adjustment to the bottle. I am running the air pump per 1 minute steps and checking amount of water pushed in a scaled container. I have set my test sytem with the same height/head as it will be when installed on the tank. I have a question : when in use, the amount of liquid pushed to the tank is less and less each time, due to level going down in the bottle and time needed to build up the pressure.... For instance, if I set the air rate so that in the first minute air will push 270ml to the tank, after 10 times 1 minute (as if it was the tenth day), it will push only 150ml, and on the "20th day", it will push only 80ml (bottle is then almost empty....) Did you face that problem ? If yes how did you solve that to obtain a constant quantity of liquid injected ??? Thanks in advance for any thought on this....