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Old 08-17-2017, 04:39 PM   #1 (permalink)
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Angry Cloudy water in established tank??

I use a Fluval 70 in my 40 gal planted tank with CO2.
I clean my sponge once a month, or as needed.
After the past few cleanings my water is getting cloudy. It's not real bad, it's just a little hazy.I don't know why this is happening.

When I clean my sponge in tap water I'm able to get the sponge very clean. the water would get a little hazy for a day or so then it would clear up and look great. And then it would get a little cloudy when the sponge needed to be cleaned again, that's if I didn't keep up with my regular schedule. This is basically the way my tank works. I've been fine with this so far, but lately the water is starting to stay a little cloudy.

I know that I lose the beneficial bacteria using tap water.


When I clean it in tank water in a bucket, I can't get it as clean. When you rinse a sponge in tank water you can't really get all of the junk out of the sponge.

A lot of people say to keep the sponge until it starts to fall apart. Some say to change it on a regular basis.

My current sponge has been in for about 6 months.

Please let me know what you guys and gals think about this.

Thanks for the help!!
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Old 08-19-2017, 12:49 PM   #2 (permalink)
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Default Re: Cloudy water in established tank??

In a well-established planted tank, plants take up ammonia very efficiently, so the bacteria in the filter are not that important.

If it were my tank, I would clean your sponge thoroughly in tap water or put in a new sponge. That residue you cannot remove by gently squeezing the sponge in tank water could be causing the cloudiness, which is actually a bacteria bloom. Bacteria in the tank water are feeding off the very fresh organic matter released from the semi-cleaned sponge.
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Old 08-19-2017, 04:17 PM   #3 (permalink)
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Default Re: Cloudy water in established tank??

Thanks a lot for the info. I appreciate it!!
I agree with you. I prefer tap water to clean my sponge.

Would it be a good idea to replace the sponge say, every 6 months or so?
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Old 08-20-2017, 12:25 PM   #4 (permalink)
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Default Re: Cloudy water in established tank??

Quote:
Originally Posted by rs18alpha View Post
Would it be a good idea to replace the sponge say, every 6 months or so?
If you clean it out good, I don't think it matters. I use mine until they fall apart.
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