I don't think 1 minute resolution is necessary in most cases. The range you were doing previously (6-10 minutes) will give a clear indication of what the tank is doing. My preference would be to have faster graphs with a lower sampling frequency. Most parameters in a tank change slowly over time and will not need that frequent of sampling.
I could not find any specific references to the frequency Apex uses but looking at sample graph on their fusion product I did not see anything less than hourly.
I could not find any specific references to the frequency Apex uses but looking at sample graph on their fusion product I did not see anything less than hourly.