ImACoolguy
Aquarium Advice Addict
What would the sun do to cause cloudiness?
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Dang autoCorrect on my above comment lol. Direct sunlight is what helps algae bloom in nature, the same works in your aquarium. Unless it's a heavily planted tank, algae will slowly manifest itself. Diatom outbreaks can also happen this way. Diatoms are pretty good at clouding the water I had an outbreak in a new tank one time.
Caleb
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