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Hey ya'll! I've got a 20gal hex tank : penguin biowheel filter,airstone,pebble substrate 2-3",Temp.78 degress. And Have had the same fish and done the same cleaning process for 6-7months now, Yet all the sudden I have fish die Everyother day for the past week. Always just one at a time. My water reading are:
P.h.:7.4-7.6
Nitrite:0
Ammonia:0
Nitrate:5.0-0
I use a API test kit! Had a platy and two threadfin rainbows die on me. I have 6 Neon tetra left.

What's your water temperature? and what are you feeding them, how often?

TTFN --->Ta-Ta-For-Now
Kelly ;o}

The temp is 78. I feed them Tetracolor flakes. Once a day!

Has anything changed in there environment? New fish? Temp in your house change? Anything in the air like air fresheners? Smoking in the house?

are there any physical syptoms on the fish?
+spots
+scale portrusion
+scale loss
+open wounds
+etc

There could be a bacteria or parasite causing this...

\\\\\\\"an ounce of prevention is worth a pound of the cure\\\\\\\"

None of the above that I can see!

When was your last water change and how much? What's the source of the water (city water, well, etc.)?

Which fish specifically have died, and do you remember the order?

Hey! I did a change monday. My normal 5gals of city water. The threadfin rainbows died first than the platy. None since then. so no death for about 2-3days

You could have multiple problems that's starting to pile up. Water temp. may play one part in your issues. The threadfin is a pretty warm watered fish. If the temperature dipped suddenly, you could have had them die from cold water shock. Your normal temp (78), is just at the threshold of tolerance. Do you keep a temperature gauge and a heater in the tank? If not, do you check the temp on a reqular basis for spikes and dips?

TTFN --->Ta-Ta-For-Now
Kelly ;o}

Yea I keep both in the tank! It used to be 82degrees. But once they started dying I turn it to 78 cuz I thought it maybe a little warm, seeing how there nothing worng with the water to speak of.

The last water change, you said, "Your usual 5 gallons of water". How long was the one before that one? If you are in a northern state, your water is a lot colder now than the past couple of months. The water change could have dramatically changed the temp of the tank, therefore, killing those fish. The threadfin being more temperate died first then the platy. The neons are a little more hardy. I would suggest when you do a water change in winter to use warm - lukewarm water. In the summer the water doesn't get soooo killer cold for the fish, although, I would still suggest tipid - lukewarm water changes then. See if this helps

TTFN --->Ta-Ta-For-Now
Kelly ;o}

Hi,
I'm not sure where all this discussion of water temperatures
is going. Phrases like tepid and luke warm, are too vague.

When doing water changes, the replacement water should
ALWAYS be within two degrees of the existing tank water.
Any more or less streses the fish and can lead to death
or a case of "Ich."

Frank


-->>> The Confidence of Amateurs, is the Envy of Professionals <<<--

Hey! I did a change monday. My normal 5gals of city water.

I am going to run a mile from the temperature issue.
There is a good chance it could be a once off problem with your water supply it does happen and there is basically no way you can trace it, but what you can do is go to your LFS (MUST draw water from same source) and they take it directly from the tap no extra filtration etc.
Talk to them about the issue to see if they know about any water problems.
I do not know your area or its water supply and I cannot comment on that at all.

Finally think about every detail concerning that water change many things can happen.
Eg how did you remove the water, how did you replace the water containers etc were they all clean and are they used for other purposes other than your tank. If no buy some for the tank use only.
You have the problem and the only way it can be solved is to give us EVERY detail about your water changes and the water. Have you had your tap water tested if not get a FULL test done.

Several years ago I had a massive water problem and it took a lot of hard research to find the problem and fix it. Basically it is a problem caused by our drought (low water dam levels) in my area and as soon as the weather warmed up it created a very nasty problem my tank went into a mini cycle at ever water change. By making a few changes how I collect and what I put into the tank at every water change the problem no longer occurs BUT and a BIG BUT the problem is still there in my water supply.

Have a look in [link=My Profile] http://www.fishprofiles.com/forums/member.aspx?id=1935[/link] for my tank info
Look here for my
Betta 11Gal Desktop & Placidity 5ft Community Tank Photos

Keith

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