New site just found it :) maybe just some advise


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Hi love this site and the info I have read Im from Johanneburg .South Africa

I built a pond last year havent had any fish die had about 25-30 goldfish and had 4 koi but my pump packed up during the night and in the morning 3kois died and xouple goldfish, is this right that they would die so fast without the pump working. My pond is 3mtr x 2mtr x 800mm deep have a 4000ltr per/h pump with a 5000ltr bio filter, did my fish die maybe because it is overstocked probably a stupid question ĺol the kois were over a year old about 250mm long
 

Meyer Jordan

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At about 1250 gallons and 30 to 35 fish, you could say that you were overstocked with the pump operational
 
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Thanks Meyer,well hope i dont get some mare babies then as I have couple of fat looking goldfish
Was sad about the koi had them for over a year and watched them grom from 50mm to abot 250mm think need to maybe consider redoing my pond and make it bigger
 

Troutredds

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Welcome to the forums! You should find a new home for your remaining koi and most of your goldies. Your system is grossly overstocked for it's size and I fear your fish will continue to die off as they grow and multiply. Good luck!
 
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Thanks Red when I started last year I only had 13 goldfish and 4 koi im sure some of the goldfish had eggs soon after i got them

I guess i will try find a bew home for some
 

addy1

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Welcome to our group! I agree with the above, over stocked!
 

Troutredds

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Maybe a local pet shop will take some off your hands. It's great to have a member in South Africa.
 
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i assume they died because of oxygen , not bcz of lack of filtration thats why it was quick , were u not around?
i think now its not overstocked as u only have few goldfishes and 1 koileft , you can still raise them as they survived till now but need to add aerator and upgrade pond asap .
 

peter hillman

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Troutredds

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How many fish do you think my size pond can handle
Stocking capacity is a topic of varying opinions. Guidelines vary in approach, for example: the surface area approach may say you need up to 300 square feet (or more) of surface area for each fully grown koi, 150 square feet for each goldfish. Others, from the volume approach, say you should have at least 30 gallons of water volume for each adult goldfish and 150 gallons (or more) for each koi. Opinions on all these numbers vary widely.
All that said, I myself err on the side of caution and understock our system, well below any of the suggested parameters. We have nine fish, about 12 pounds of fish biomass, in a 6000 gallon system. In my opinion, understocking your pond results in less stress on your fish, less stress on their aquatic environment and less stress on you, the pond owner.
 

Troutredds

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There are so many variables, including the SSA of your pond and filters and their ability to process accumulated waste...
 
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you can calculate the surface area, look up your likely high temps to estimate dissolved oxygen levels, then look up some stocking rates according to the fish size and number
 
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Welcome to our new member from Joburg! My family and I visited there a few years ago and we really enjoyed South Africa. I'm sorry about your fish, but everyone starts somewhere. If you stay active on the forum you will learn a lot!
 
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You were not super overstocked but you certainly cannot afford to have your pumps go out if your stocked at this level. IMO if you wanna maintain 4 kois and 30 goldfish in a 1250 gallon pond youlld need to have more than one filter and pump going and you'll need a bog.
 

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