Take the fish out, put them in a bucket or another tank and do a serious water change on the offending tank. Anytime you see fish have trouble breathing after a major muck-up, immediately do another water change, or several. Don't wait overnight! Susan -----Original Message----- From: gsas-member-bounces@thekrib.com [mailto:gsas-member-bounces@thekrib.com] On Behalf Of Laurel Larsen Sent: Tuesday, February 17, 2009 7:55 PM To: Greater Seattle Aquarium Society member chat Subject: Re: [GSAS-Member] Thick Water What likely happened is that you stirred up a great deal of detritus that had either formed anaerobic pockets or just hadn't made it's way through the nitrogen cycle, and you had a huge ammonia spike. You should consider testing your water for ammonia and nitrites to see if you have ANYTHING registering. A properly cycled tank(with an intact nitrogen cycle) shouldn't have readings of ANY ammonia or nitrite. Such readings would indicate that stuff that shouldn't have been in the water column was. Heavy breathing is symptomatic of ammonia poisoning in fish. You may consider dropping the tank temperature to the low range and slowly dropping the pH as much as is safe. Ammonia is less deadly at lower pH. Do some reading on old tank syndrome and be careful when stirring up detritus. It's one of the reason that I switched to sand in my tank, poo cannot settle between grains of sand. On Feb 17, 2009, at 7:35 PM, Shango Los wrote: > Hi all, > > I did a serious clean one of my community tanks last night. During > that > cleaning, the water churned A LOT. It became thick with sludge > (what is the > word for it? Moosh? Melsh?) Unfortunately, the White Clouds and > Guppies > began to have difficulty breathing I realized. Today, I see that I > lost 3 > fish overnight and one more is heavy breathing . I had no idea that > the > thick water could be THAT bad for the fish. > > Has this ever happened to anyone else? Where should one draw the > line with > churning the water? How can one avoid this? Is this worse with > small fish? > > Anything folks have to offer I'd like to hear. I don't want to > cause this > suffering again. > > Thanks > > Shango > > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member