Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Just an observation,I often see the drop checker's mounted high on the glass near the surface where CO2 gas would be a much higher value than lower in the tank.
This lead's many to assume that levels are closer to the value they want than they really are.
Would were it me (and it ain't),want drop checker lower on the glass, and at oppisite end of tank from where the gas is being diffused/entering.
Drop checker is more of a visual aid, to give an idea as to CO2 concentration at a glance,but right solution in drop checker and lower placement might be consideration for me .