ph problem

[tankertoad]

My well water has a naturally high ph (close to 8 ).  Is there a technique to mitigate that issue for tomatoes grown in an Earthbox container?

Also, am I intensifying the ph issue by using ammonium calcium nitrate weekly to prevent blossom end rot?

Thanks

[gardendoc]

Just make sure you add enough dolomite every time you plant tomatoes. The snack is 1 tsp calcium nitrate

[tankertoad]

Thanks for the reply and suggestion.  I set my boxes up exactly as recommended and used Earthbox potting mix, dolomite, and fertilizer.  I also regularly use the snack in the form of Greenway ammonium calcium nitrate, at 15.5-0-0 and 19% calcium.