Guppy fry dying ?? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 08-12-2015, 07:26 PM Thread Starter
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Guppy fry dying ??

In a 10 gallon bare tank I have 40 fry about 4 weeks old.
All have been doing great.
This morning I changed 40% of the water like several times in the past (well water).
A few hours later there are about 10 of them having a real bad time swimming. They are upside-down, sideways and tumbling in the current.
Can a major water change do this?


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post #2 of 5 (permalink) Old 08-12-2015, 07:27 PM
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It shouldn't. I do 50% changes on my guppy tanks all the time.

Have you check the water parameters on the tank water and the well water?

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post #3 of 5 (permalink) Old 08-12-2015, 07:49 PM
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It shouldn't, but it could if your well water parameters are changing.

We had a very rainy spring around here, and my tap water dropped 1-2 dKH and 2 dGH...

New to planted tanks, avid gardener/tinkerer.

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Fluval C4 + Quietflow 30, Finnex Planted+ with
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, low-tech.
10 gallon secondary tank with Finnex stingray with
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, AC20, low tech
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post #4 of 5 (permalink) Old 08-13-2015, 08:33 AM
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Just a though, well water can be very low in oxygen. You might want to draw it the day before and pit an air stone or powerhead in it overnight.

Fry are a lot more delicate, so it doesn't take much to kill them compared to adult fish.
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post #5 of 5 (permalink) Old 08-13-2015, 05:50 PM Thread Starter
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I think I know what happened.
Last night (the day of the water change) there were at least 12 fry laying on the bottom, stuck to the filter intake, or swimming all squirrely.
This morning I find 2 dead fish, and the remainder all back to normal.
I'm guessing I over fed them to which they ate until sick. Fortunately, the food passed and they recovered; which is amazing seeing how distressed some of the were.


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