Foggy Water - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 01-13-2013, 11:06 AM Thread Starter
Foggy Water

Hello Everyone, My 10 gallon planted tank water has become pretty foggy after a water change and filter cleaning. I know i did not harm the beneficial bacteria because i rinsed the filter fiber and pad in the old tank water and not tap. It has been 2 days now and it is still foggy. Should i do another water change? My tank has wisteria, Lutea Crypt, and a Banana sword in it. The inhabitants are 4 Silvertip tetras, 4 Neons, A platy, and a Dwarf Gourami. I do weekly 20% water changes on a strict schedule. Thanks.
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post #2 of 3 Old 01-13-2013, 11:52 AM
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I wouldn't worry. I see this in my tanks with canister filters after every rinsing of the filter, it takes 2-3 days for the water to return to its normal clarity. You have messed with the bacteria in the filter media; there is a host of various bacteria living there, beyond the nitrifying strains, and this disruption can often (usually) cause a bacterial bloom.

If you want to read more about all the bacteria, have a look at this:

After a water change some slight cloudiness is also common. This can be due to suspended particulate matter in the tap water [viewed under a microscope, you might be surprised at how much stuff is in the tap water], or again to the bacterial bloom. Tap water is high in dissolved organics, and this feeds bacteria, as that article I linked will explain.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 3 Old 01-13-2013, 12:00 PM Thread Starter
Alright Thank you Byron!! I will read the Article!!!
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