Germs are an important factor to consider when it comes to pool safety. Pool water can easily become contaminated with bacteria and even viruses that can cause illness in swimmers. It is essential that the pool’s pH, chlorine, and other chemical levels remain balanced to help prevent the growth of these germs. The CDC recommends that you check the disinfectant level and pH at least twice per day. If the pool is being used heavily, this should be checked even more often.