Aquarium Cloudy After Adding Fish. Overcrowding an aquarium with too many fish will overload the filter system overwhelming the beneficial bacteria that process waste products and leading to bacterial bloom and cloudy water. 3 days was almost certainly uncycled and too early to be adding fish so its entirely possible that your food poopurine from the fish contributed to a bacteria bloom which clouded up your tank.
As ammonia from fish waste builds up bacteria start to establish and float through the water creating the cloudy appearance. Usually when I add fish I change at least 10 but usually 20 every other day for a week until it clears. Since the proper PH the water is so cloudy that you can not see through it.
Cloudy water aquarium remover.
This phenomenon can take place in both an established or a new aquarium. The cloudiness is caused by residue from poorly cleaned aquarium gravel or dissolved mineral constituents but by far the main cause is bacterial bloom especially in new tanks. This phenomenon can take place in both an established or a new aquarium. Typically the cloudiness occurs after 2 to 3 days of setting up but can occur also in an established tank.
