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Home: KOI Talk: Pond Water Quality:
Green water! Good or Bad?

 





 


Anonymous
Anonymous

Jan 15, 2000, 5:22 AM

Post #1 of 9 (2602 views)
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Green water! Good or Bad? Can't Post
 
I am just wondering how beneficial is green water to koi? I have a pond which is sheltered with black nettings. Its water is cystal clear. This is where I keep most of my better quality kois. Recently , we constructed another bigger one which is exposed to direct sunlight. As a result, the water is never clear. It always remain in a greenish condition. I have heard and read that green water is extremely beneficial to koi. So I was thinking whether I should transfer some of the better koi to be grown in the new pond. Will that help?


Melvin Tan
Koi Lover

Jan 15, 2000, 12:56 PM

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Green water! Good or Bad? [In reply to] Can't Post
Hi,

green water containing a high amount of microscopic algae is supposed to be good for koi - one reason being it's closer to a natural habitat. Also the algae serves as food for the koi.

But if your other pond is unshaded and water is not totally opaque, be careful as your koi might get "sun-burn" resulting in a kind of 'washed-out' look.

Cheers!


ksng
Koi Lover

Jan 15, 2000, 1:22 PM

Post #3 of 9 (2602 views)
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Green water! Good or Bad? [In reply to] Can't Post
so do u mean outdoor pond should have shaded??? my fibre tank is unshaded and the water is green for about 1 months,so any suggestion?


dttk
Senior Member

Jan 16, 2000, 3:06 AM

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Dear Marcus, the outdoor pond should be at least 50-70% shaded in a tropical country like ours 1)to prevent green water 2)green water causes oxygen level in water to drop at night which is bad for the fish, 3)shading ensures cooler water which is good for koi since koi is a cold water fish and bring out colour better, 4)cooler water carries more oxygen which is good for koi. Cheers!


Bancherd
Koi Lover

Jan 16, 2000, 9:00 PM

Post #5 of 9 (2602 views)
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Green water! Good or Bad? [In reply to] Can't Post
Hi Marcus:

My new pond(about one month old) is outdoor, and has direct sunlight about 95%, its water is VERY green. I am in the process of trying to find out for myself about the benefits of green water(I have kois ranging from 2-8 inches in length).

About the effects on oxygen level, that is a possibility, but I did not see my kois grasping at the surface in the morning(and pH did not crash).

What I have observed so far(after three weeks) are:
1) the red color is brighter, and the white background is much improved(could be my imagination here), and the sumi improves with small sumi-markings disappeared.
2) the kois seem to have problems seeing floating pellet foods.
3) the kois become less tame(during feeding time). Now they just grabbed the pellets and dashed down to hide instead of staying at the surface.

One BIG drawback of green water is that I could not observe the kois, except during feeding. So if they were sick, hiding at bottom, etc, there is no way of finding out.

To help with oxygenation, I have added a small water fountain, and I DEFINITELY is planning to provide shading for my pond, in a month or so, once I finish with the green water experiment.

Regards,

Bancherd

(This post was edited by Bancherd on Apr 1, 2001, 3:00 PM)


cch
Koi Lover

Feb 13, 2000, 1:38 PM

Post #6 of 9 (2602 views)
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Quote
Originally posted by ksng:
so do u mean outdoor pond should have shaded??? my fibre tank is unshaded and the water is green for about 1 months,so any suggestion?
It is advisible for outdoor pond to be partly shaded (at least 50%). I read from the other thread that your pond is only either 3 or 4 feet deep, then you have more reason to shade your pond.

cheers


cch
Koi Lover

Feb 13, 2000, 1:42 PM

Post #7 of 9 (2602 views)
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Green water! Good or Bad? [In reply to] Can't Post
 
Quote
Originally posted by Marcus:

I am just wondering how beneficial is green water to koi?

Green water is naturally good for your koi. While serving as food for your koi, it also absorb a lot of nitrate from your pond water.



Anonymous
Anonymous

Jun 29, 2000, 9:53 PM

Post #8 of 9 (2602 views)
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Green water! Good or Bad? [In reply to] Can't Post
Hello! I am a newbie and just built a pond that gets DIRECT sunlight! Right now the water is VERY VERY green! I've tried several chemicals but it didn't help. Any suggestions?? Some of you in this forum said that green water is good for the kois...so should I or not try to make it clear? As for me, I'd love to be able to see my kois. Any suggestions regarding this is very appreciated!!!!


Khoobg
Webmaster


Jun 29, 2000, 10:24 PM

Post #9 of 9 (2602 views)
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Green water! Good or Bad? [In reply to] Can't Post
A pond, even without any shade, can still have crystal clear water if your pond is equipped with a good filter of sufficient size.

There is no need to add chemical to your pond to stop algae as these chemical is sometime expensive and dangerous. Read this thread for some info http://www.koi.com.my/ubb/Forum3/HTML/000063.html

To enable the forum members to advice you, please let us know your pond size and the filter size and how many koi you are having in the pond.

New pond tend to have green water for several months until the filter is matured. Hence it is normal. You can always add biozyme to jump start our filter.

But if your filter is undersized, you may have to face with green water for a long long time until you increase your filter capacity.

Cheers

 
 
 



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