trouble with pH in hot humid weather

[Pistondog]

I just read about CO2 and humidity, I’m have humidity issues in my house and lower ph levels in my aquariums, says higher relative humidity causes higher CO2 levels, I just recently purchased a dehumidifier and once I get it setup and running and drop humidity then I want to see if that actually helps with the ph

What did you read about CO2 and humidity?
How does high humidity raise or change CO2 levels?
One cause and effect might be that humidy causes people to run ac more, closing windows.
Let us know how your dehumidifier helps.

 

[Randy Holmes-Farley Verified Community Expert]

I just read about CO2 and humidity, I’m have humidity issues in my house and lower ph levels in my aquariums, says higher relative humidity causes higher CO2 levels, I just recently purchased a dehumidifier and once I get it setup and running and drop humidity then I want to see if that actually helps with the ph

That is not true. Don't waste time on this.

The only relationship between humidity, CO2, and pH are:

1. Higher humidity means less evaporation, and if you dose an alkalinity supplement by ATO, that will change with humidity, thereby changing pH to some extent.

2. Reduced air exchange in your home between inside and outside can cause humidity to rise inside, and that same poor air exchange can allow CO2 to accumulate, reducing tank pH.

A dehumidifier impacts #1 but has no effect on number 2 or any other effects on CO2.