Fish keep dying :(

estebanrey said:
There's no such thing as a fish
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It's true. The concept of a fish is a human invention. The most recent common ancestor of what we call fish is also the most recent common ancestor of all four legged land vertebrates. In the 16th century, seals, whales and crocodiles were all called fish.
 
I don't like the way youre wording that.

Theres these things, they live in the sea and swim about...and people call them fish. So obviously they exist.
 
And if the fish enjoy eating it, imagine how much YOU will enjoy eating it.

It makes a nice pate, mmm algae pate on french toast.
 
Replace a large amount of the water in the tank. The more the better.
What filtration are you running in the main pond, has this been kept running with water, and can you plumb it into the tank?
You have no bacterial filtration going on, and as a result, you had an ammonia spike followed by a bloom I reckon.
The fish are basically bathing in their own muck.
You will lose all of them at this rate.
 
ltnmzh said:
OP, any news? please report back. (Maybe he is crying in a corner now....)
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Well, we lost all the Koi, 10 in total, and a tench :(
All 12 of the gold fish survived, but they're only little.

I replaced 1/4 of the water, which probably saved the gold fish, but the Koi which were much bigger just couldn't survive in a tank which was overstocked and unfiltered.

We rushed to get the pond rebuilt and put the fish in two days ago, and the Goldfish look lost in there :D:p, just zooming around all day.


Were using a large 75 letre tank with lots of different foam, lava rocks, stones etc, which is a bio-filter tried and tested, but as it is set into the ground on the same level as the pond, we couldn't use it for the tank.

Were being given some small Koi soon, and i'm thinking of buying some 10" from here just to get it looking like a good pond again.


Thanks for your help people, I've learnt a lesson on this one :o
 
ahh man sad to hear this i still remember waking up one morning and wondering why all my terrapins were upside down in the fish tank....
 
kilohawk said:
Well, we lost all the Koi, 10 in total, and a tench :(
All 12 of the gold fish survived, but they're only little.

I replaced 1/4 of the water, which probably saved the gold fish, but the Koi which were much bigger just couldn't survive in a tank which was overstocked and unfiltered.

We rushed to get the pond rebuilt and put the fish in two days ago, and the Goldfish look lost in there :D:p, just zooming around all day.


Were using a large 75 letre tank with lots of different foam, lava rocks, stones etc, which is a bio-filter tried and tested, but as it is set into the ground on the same level as the pond, we couldn't use it for the tank.

Were being given some small Koi soon, and i'm thinking of buying some 10" from here just to get it looking like a good pond again.


Thanks for your help people, I've learnt a lesson on this one :o
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*slow clap*
 
Its clearly the work of a grizzly bear, coming down from the mountains to feast on your delicious fishies. The only recourse is to set a mine field around the fish pond.
 
Wait, you are wondering why they are dieing when they are in a small tank which is not filtered?

/facepalm

Ammonia poisoning ftw.

One of the first things you should know about about fishkeeping.
 
BDEE said:
Wait, you are wondering why they are dieing when they are in a small tank which is not filtered?

/facepalm

Ammonia poisoning ftw.

One of the first things you should know about about fishkeeping.
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Yeah:P

It was planned to only be a week or so, but it turned out to be a couple of months. We tried patching the holes which didn't work, so we had to rebuild it.

We should have fashioned a small filter though....hindsight.
 
When you said you had 10 koi and a few goldfish in a temporary tank, I was thinking it would have to be at LEAST 500L with a MASSIVE filtration system, not 75L with no filter at all.. I wouldn't have expected them to last a day, not a week. But all you can do now is learn from your mistakes, hopefully it won't happen again.

I don't think a "small filter" would have made any difference, you would have had to have some massive filtration system on a 75L tank with even 1 single koi! Also it would have had to be cycled before use.
 
10 inch Koi in a 75 litre tank? Are you sure it was as small as 75 litres?
50cm by 50cm by 30cm, thats 75 litres right?
A 10 inch Koi could barely turn around in that.

750litre maybe?
 
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