Dead fish in my pond? Alot Algea also. HELP!?

Question

i woke up this morning and there was alot of algae and watter was really green. i found a dead fish. Was the algea the cause of it? how do i get rid of the algea witho out harming the fish ? i need to know Fast i have expensive koi fish in there

I repeat thou it was in an outside pond.

i have medium size koi e like 5 inch and little gold fish so far i found 1 dead goldfish and 1 dead 4 inch koi. i did see the algea before but today the water got real dirty. im planning to go buy a water vaccum and clean all the tank. but whats the best way to keep it from getting algae?

Answer 1

Green water is free floating algae and this by itself is unlikely to kill your fish.

That said this can be a symptom of other problems such s a low Redox Potential, low dissolved oxygen, poor filtration and circulation (or lack there of).

Often in ponds with green algae problems heat is also a factor which then combines with low oxygen levels to be deadly. Also keep in mind that green plants INCLUDING algae use oxygen at night and this can also kill when conditions are right.

Aeromonas bacteria are also prevalent in these conditions and could add to a deadly mix: http://www.americanaquariumproducts.com/Vibrio_Aeromonas.html

Recommendations:
*Change water with cooler water
*Check GH and KH; they should be a MINIMUM of 100 and 50 respectively and this will in turn help Redox.
*ADD a UV Sterilizer; this will kill algae safely (unlike chemicals which then add to oxygen depletion). A Sterilizer will also improve Redox and kill disease pathogens
*Improve circulation and filtration; Veggie filter are simple DIY filters a well as many good pressurized filters available such as the Clear Stream.
Even an airstone will aid in pond circulation and lift the water column.
*Flow through circulation can help cool a pond that is over 85 F (which would be too hot)
*Please Read these articles (and many of the Resources there in): http://www.americanaquariumproducts.com/ClearPond.html
http://www.americanaquariumproducts.com/PondAlgae.html

Finally DO NOT use algae destroying chemicals in your case as this will only exacerbate the existing problems

Answer 2

If it happened suddenly, like one day fine next day dead, I would say something toxic got into the water. Green algae wouldn't cause death, in fact its good for the fish and system. If the algea also came on over night, maybe some fertilizer from your yard or neighbor's yard got into the pond.
I would change a lot of water today, and get out any leaf debris on the bottom, and clip any dead leaves off of plants. Visit www.koivet.com and look up symptoms of fish.
go to www.goldfishconnection.com and order some medicated anti-biotic food for the survivors. (Medi-Gold)
If you could post some specific information about your pond, I would better be able to help you with what is wrong.
Ph?
Nitrate?
Last water change and how much?
Last filter cleaning?
How large is pond?
How many and what size are the fish?
Is the pond level with the ground or above ground?
Check for dead animals in pond like frogs, turtles, cats, mice or anything that could fall in.
The problem is not the algae, you must find out what happened. Reading the other's posts I wouldn't put in any algae destoying chemical in the water. Changing the water and cleaning the filter is safer and more effective. Right now I think fertilizer got into the water and adding another chemical to the water if that happened could likely kill any fish that has survived so far.

Answer 3

It's an easy answer. It's called "AlgaeFix." Use it EXACTLY as directed. I use it in my 8,500 gallon pond with great success.

My pond gets about 4 hours of sunshine or more a day. That makes the algae grow quickly. Of course, my Koi and Comets do eat the algae, but when the pond gets unslightly, I use AlgaeFix.

When you use this product, make sure that you have plenty of aeration going, as it depletes the water of some oxygen. It does stress the fish just slightly, but does not kill them. Please trust me on this. I have valued Koi in my pond also.

I do not think that the algae killed your fish, in fact I feel sure of it. Was your dead fish a Koi or a Comet?

Algae would not get "bad" overnight. It's a gradual process.

Answer 4

The Algae most likely did not kill your Koi. You can get some algae destroyers from your local pet shop and that should help your algae problem. Is your tank near a sunny window? that could be a cause of the green water. Sometimes it's hard to beat, but do a 50% water change to help thin it out, then do your algae treatment and hope it works. I forgot what it is called, but there is a bag filled with media that you can put into your filter and that will also get rid of the algae and keep it gone. I wish I could remember what it is called.....because it worked so well, and I need one now too. lol. the blind leading the blind.

Answer 5

if you dont have a pump or regularly removethe algae, it can get the fish stuck and it can kill them.

twice a month i would get like a 2 by 4, and remove the algae as it could kill the fish.


The problem is blanketweed which is a form of algae, it forms a thick mat which can trap fishes and kills them.

Thats why i use a stick to clean it out ever 2 weeks.

i wouldnt recommend algae killers. i personally would never consider them with koi, i dont consider using chemicals like that on highly priced fishes.

Answer 6

Go to petsmart, and buy algae cleaner, they will suggest the ebst thing and the ones that will not harm the fish.

Answer 7

Ditto to Carl S, Right on target!

MM

Answer 8

is this the first time it has happened? if so go to the petstore and ask for algae kilers that will clean up your pond