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scubadan206 · 02/14/2017, 10:38 AM

I have a 20 gallon top off tank. I put 6-8 heaping teaspoons of kalk in the water and I have a small pump that turns on for 3 minutes every three hours. The kalk will develop a film on the water surface that will protect it from CO2 getting to it and lowering the PH. The pump is not strong enough to break the film on the surface, so the PH stays up. My tunze ATO does get clogged periodically and has to be shaken out a bit to keep the water flowing.
If you want to put in a PH probe, it will be more like an experiment to see how well you can protect the water from CO2 contamination.

Daniel.

02/14/2017, 10:38 AM	#118
scubadan206 Registered Member Join Date: Dec 2013 Location: Kenosha WI Posts: 985	I have a 20 gallon top off tank. I put 6-8 heaping teaspoons of kalk in the water and I have a small pump that turns on for 3 minutes every three hours. The kalk will develop a film on the water surface that will protect it from CO2 getting to it and lowering the PH. The pump is not strong enough to break the film on the surface, so the PH stays up. My tunze ATO does get clogged periodically and has to be shaken out a bit to keep the water flowing. If you want to put in a PH probe, it will be more like an experiment to see how well you can protect the water from CO2 contamination. Daniel.