A state of balance between continuing processes
Answer:
You should use mineral water but you can also use tap water too, as long as you remove chemicals that are potentially toxic to fish.
Explanation:
Each (both large and small) colony is carefully counted (using magnifying colony counter if needed). Each colony represents a “colony-forming unit” (CFU). For accurate counts, the optimum count should be within the range of 30-300 colonies/plate. To insure a countable plate a series of dilutions should be plated.
