Choky water

[bttay]

I notice twice recently that after I have 50% water change, the whole tank becomes choky after 1-2 hours (it was clear just after the water change). It took about 4 to 5 hours for the chokiness to disappear.

What is the reason? Does that mean changing of water kills some of the nitrifying bacteria?

[vinz]

Interesting phenomenon. Usually this won't clear for days! I'd worry that it's a chemical reaction between tank water and new water, but I can't think of anything that might cause it. If your fishes and plants are alright and it clears within hours, then I wouldn't worry, though I'll keep wonderng.

[loupgarou]

chalky would be the word. it could be a precipitate. (eg: calcium)

[bluezing]

ah yes...this happens to me b4 also.clears up in few hrs.also finds it wierd cos i change not even 50%.at most 30% only.

[David]

How long have you been running the filter?....if its more than a year to year and a half, did you change your filter media?....not the wool but your bio rocks?

[bttay]

Thanks for the right word, Loupgarou.


David, my tank is only 2 months old. I did not change the biorock. It's a puzzling phenomenon.