Could you give some more information on the tank and what level of understanding you have.
Could you give some kind of timeline on whats been going on. How long have had the tank, how long before you had this cloudy water issue?
Do you know your water parameters? pH, ammonia, nitrite and nitrate? Actual numbers, not just they are good or low etc.
What is your normal water change schedule? How much and how often?
What do you understand about the nitrogen cycle? Is the tank cycled? If so how did you cycle it? Or do you know nothing about cycling a tank and this is the first you are hearing about cycling a tank?
A bacterial bloom is a normal part of a tank establishing. Almost every tank will go through this stage and it typically goes away in a few weeks as nutrients settle down and the tank cycles. Its generally harmless as long as it doesnt go on too long.