Water plays a huge role in the taste of coffee, so it would be advisable to use filtered water. If the water is too hard, the coffee may taste uninteresting, but if you use too soft water, the coffee may taste unpleasantly acidic. The recommended pH for making coffee would be 6.5-7.5.
The recommended water temperature for making coffee would be 92-96 C.
Using filtered water in coffee machines will significantly prolong the life of coffee machines and you will be able to enjoy the true taste of each coffee.
The grind size of the coffee must be chosen depending on the method in which the coffee is to be prepared. Coffee can be ground in a variety of ways, from very fine (Turkish coffee) to fine (espresso, moka pot), medium (filter coffee cones and machines) and coarse (coffee press). To highlight and enjoy the true taste of each coffee, it is recommended to grind the coffee beans just before brewing.
Everyone is tasting differently, so it is best to be guided by our feelings. The recommended amount for making coffee, for example with a coffee press or filter coffee machine or cone, is 60g of ground coffee per 1l of water.