Sudden disaster, help!

[CuckooCat]

I have had this tank for over a year now and have never experienced anything like this. Yesterday, I thoroughly clean the tank, did a 30 percent water change and replaced the filter as it was desperately in need of doing so. Everything seemed to be okay even this morning as I left for work. Upon returning home I find the the water has become extremely cloudy, an immense amount of white looking algae is all over my plants and four fish and all of the shrimp have passed away, the only survivors are a few Cory cats. I’ve had a bit of algae growing recently but I would just clean it out. Any help would be appreciated I’m not sure what to do and fear for the remaining fish.

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[charliebankston]

I'm sorry your shrimp died. When was the last time you did a filter media and water change before yesterday?

 

[CuckooCat]

I do a water change bi-weekly, and change and clean the filter probably once a month. Just want to give my remaining fish the best chance at survival at this point

 

[charliebankston]

Oh OK, good deal. I was thinking maybe it had been awhile. That blows my guess/ theory out of the water.

 

[charliebankston]

Did you do another water change today?

 

[CuckooCat]

I did another 30% water change after I cleaned the dead fish and shrimp out. The remaining fish are occasionally swimming in erratically but other than that they seem to be okay for now.

 

[charliebankston]

OK good. I'm sorry I don't have an explanation for you. Maybe some one else will

 

[charliebankston]

Are you able to do a water test?

 

[CuckooCat]

I do not have the test kit at home or I would have done one immediately, I will take a sample to the local aquarium store tomorrow though. It’s okay, I just want to figure this out.

 

[fishwonder]

Sounds like your thorough cleaning, replacing the filter basically blew up your bacteria since you have cloudy water now. This should never be done. Read here for info and browse this site. Post your water parameters.

https://aquariumscience.org/index.php/6-8-thorough-cleaning/
https://aquariumscience.org/index.php/6-2-3-bacterial-blooms/
https://aquariumscience.org/index.php/6-4-crystal-clear-water/

 

[LuckyScales]

did you ever use the water clarifier that looks red? If so it clumps together a bunch of stuff in the water and will suffocate the fish then it will look like white algae and isn't good I learned from experience