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Home: Koi Health: Koi Feeding, Nutrition and Diet:
how much do i feed my fish?

 





 


marcus1975
Koi Lover


Jul 21, 2007, 2:30 AM

Post #1 of 6 (1075 views)
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how much do i feed my fish? Can't Post
hello

this is my first post and i am a newbie to keeping koi :)what i want to know is how much should i be feeding my fish ?? i have 2 8-10" fish 8 4-6 " fish and 4 gold fish around the 4" inch mark in total 14 fish .

i have been feeding them 20 grms of food a day so far what do you guys think ???

Mark


larz1
Koi Kichi


Jul 21, 2007, 2:57 AM

Post #2 of 6 (1071 views)
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Re: [marcus1975] how much do i feed my fish? [In reply to] Can't Post
That would be appropriate for the amount of fish you have at these sizes. The Koi will consume more and grow more at a young age, so feeding them around 2% of their body weight is good, so long as you have warm (around 70-85 deg F) water temperatures. As the weather cools you will need to slow it down some, and if your water temps drop below 50 deg you need to let them fast. As they get larger their growth rate will slow and you'll need to cut the amounts down, but that is several years down the road.


marcus1975
Koi Lover


Jul 21, 2007, 3:06 AM

Post #3 of 6 (1069 views)
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Re: [larz1] how much do i feed my fish? [In reply to] Can't Post
thanks for that :)

i dont know if the recent cold weather is affecting them because their just not eating very much at the moment .

Mark


larz1
Koi Kichi


Jul 21, 2007, 8:26 AM

Post #4 of 6 (1063 views)
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Re: [marcus1975] how much do i feed my fish? [In reply to] Can't Post
Koi metabolism is very sensitive to water temperatures and water chemistry. The two tend to go hand in hand in a well designed/filtered pond, so this is a good thing. At Water temperatures below 50 deg F Koi should be fed little if anything, below 45 deg, nothing at all. Above 50 deg you can feed as much as 0.5% of body weight if your filters are performing properly. Above 65 deg 1.0% is good. As you approach 80 deg you can raise it up to 1.5-2.0%. Koi Metabolism doubles every 18 degrees F in water temperature and that is important to help you determine how much to feed at any given time of year.


marcus1975
Koi Lover


Jul 21, 2007, 7:41 PM

Post #5 of 6 (1053 views)
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Re: [larz1] how much do i feed my fish? [In reply to] Can't Post
Thank you thats very helpful ,i live in Scotland by the way and we are having a terrible summer here ,the air temperature has been hovering around 50 deg for the last few weeks compared to over 90 deg last year at the same time ,the average should be more round 70 deg for this time of year .

i am going out to buy a water thermometer soon and then i going by what you have said about feeding to weight ratios at certain temperature i will try to work out the amounts of food to be given .

do you know of any charts i can get that will tell me the rough average weight of fish going by its length ? it just that i dont want to have to weight each fish and stress them out .

and just to know i have got this information correct can you confirm these examples for me ?

1 fish weight 500 grams the feeding for this fish would be at 45-50 deg little or nothing
50 -65 deg 0.5 % = 2.5grms for this fish
60- 80 deg 1% = 5.0
80+ 1.5- 2% = 7.5-10 grms

would that be correct ?

Mark


larz1
Koi Kichi


Jul 21, 2007, 10:40 PM

Post #6 of 6 (1049 views)
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Re: [marcus1975] how much do i feed my fish? [In reply to] Can't Post
Here is a fish weight calculator I use. It seems pretty accurate.
http://www.cnykoi.com/calculators/calclenw.asp
Same here with the weather being odd. Last year we were in a drought. This year we have had 20" above normal rainfall and are just now hitting our normal high summer temperatures. (Global warming my arseWink)
One other thing. These feed rates are for maximum growth on young, fast growing fish. If your filter can't keep up with the waste production you'll have to cut back a bit so your water stays healthy.
In Reply To
Thank you thats very helpful ,i live in Scotland by the way and we are having a terrible summer here ,the air temperature has been hovering around 50 deg for the last few weeks compared to over 90 deg last year at the same time ,the average should be more round 70 deg for this time of year .

i am going out to buy a water thermometer soon and then i going by what you have said about feeding to weight ratios at certain temperature i will try to work out the amounts of food to be given .

do you know of any charts i can get that will tell me the rough average weight of fish going by its length ? it just that i dont want to have to weight each fish and stress them out .

and just to know i have got this information correct can you confirm these examples for me ?

1 fish weight 500 grams the feeding for this fish would be at 45-50 deg little or nothing
50 -65 deg 0.5 % = 2.5grms for this fish (YES, GRADUALLY INCREASING TOWARD 5 GRAMS AS TEMPS APPROACH 65)
60- 80 deg 1% = 5.0 (YES, GRADUALLY INCREASING TOWARD 7.5-10 GRAMS AS TEMPS APPROACH 80)
80+ 1.5- 2% = 7.5-10 grms (CAVEAT, NUTRIENT ABSORPTION SLOWS SOMEWHAT ABOVE 80, KEEP BELOW 1.5%)

would that be correct ?

Mark

(This post was edited by larz1 on Jul 21, 2007, 10:43 PM)

 
 
 



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