"All the sudden" Cloudy water question (but not a newby)

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SwissTrees

Black Skirt Tetra
MFK Member
Oct 11, 2016
43
19
13
Ohio
Hello all,
First off let me start by saying HI. Im a new member but not a new reader of all the great info on here. Im posting because i went through the search bar and found helpful items but not one that could maybe tell me where I went wrong.

So I have had my 45g tank running for about 5 months. I cycled it as normal for about a month with 2 fish (a pleco and a 1/2" barb) with a canister filter and got it established. Since then Iv added three 1" red bellies and one orange lobster. By the grace of the fish gods the Reds haven't even poked at the lobster or the barb or the pleco in the entire 5 months! They actually live in peace contrary to other members posts Iv read lol. With that said, let me explain my recent problem.

So after about 5.5 months of perfect clear water, I decided it was time to do a thorough cleaning of my tank and filter. I had been doing weekly 25% water changes leading up to this as the Reds are messy eaters.
I replaced the bottom filter media (various pads and such) and washed off the Bio balls at the top. (I think this may have been my first mistake as i might have rinsed off some of the good bacteria)??? After this point my water seems to have become a slight milky white color even 24 hours after a good water change. In the following two weeks, I got frustrated and did water changes twice a week hoping that would get rid of the milky-ness.

#1 I know that a slight milky color means a bacteria bloom, correct? I feel my over zealous filter cleaning may have got rid of some of the good bacteria that was keeping my water so clean?
#2 I got rid of a few live plants thinking they caused an algae bloom. I dont think that was the case as I put some new LIVE plants back in and it actually seems to be helping.

After talking to various fish ppl, It seems as the white milky color is bacteria. Could I have just reset my tanks bio filter by washing it or do you guys think there is something else im doing wrong? My substrate is not an issue. It was always washed and I dont have a crazy filter head stirring up debris.
 
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Reactions: Deadliestviper7
Yes you are correct, when you cleaned your filter and rinsed off some of the bio media. Btw do you use dechlorinator during wc's? I personally just swish my media in the aquarium water that I took out during wc.
 
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Reactions: Lady Sphinx
The cloudy water is probably a bacterial bloom (not harmful) and may be the result of the thorough filter cleaning you did.

If you have a test kit, test the water and post the results for ammonia, nitrite and nitrate.
 
I have much more experience with saltwater fish. If it is Bactria bloom, you need to run uv sterlizer
 
I have much more experience with saltwater fish. If it is Bactria bloom, you need to run uv sterlizer

Isn't it just the opposite? UV should be off during a mini cycle?.
 
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Reactions: tlindsey
Isn't it just the opposite? UV should be off during a mini cycle?.
Yep.

If you did rinse it it the filter is resetting itself with a ney cycle. Never put filter media in anything but a bucket of tank water!

Also welcome to the club! :)
 
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Reactions: Lady Sphinx
Run a uv, the water will clear up overnight. Sounds like green water (even though it looks milky white).
 
Run a uv, the water will clear up overnight. Sounds like green water (even though it looks milky white).
It is going through a cyclie again, UV will prolong the process and it could result in harm to the fish
 
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