Jul 12, 2002, 6:03 AM
Post #29 of 35
Re: [Koifun] Nirite and Flashing problem
[In reply to]
I am so sorry to hear about the death of your kohaku! Since you are rather new to koi keeping and also new to this forum, I need to ask a few questions to establish some parameters for us to help you, if you don't mind.
1. How long have you had your pond?
2. How big is your pond? L x W x D
3. How big is your filter? L x W x D
4. How many kois are in your pond?
5. What filter media do you use? Brushes? Japanese mats? Lava rocks? etc
The reason we need to know all these is to ensure that we are able to dispense (hopefully) more accurate advice.
Meanwhile, from your description of your fishes jumping and with bulging eyes etc, I can tell you that your fishes are not happy with the pond water!
You have tested for ammonia which is 0 and nitrites 0.5ppm and pH 7. When did you do the test? Morning? Evening? You might want to do 2 tests, once in the morning and once in the evening for comparison. This will give an indication whether your pH is fluctuating or not.
Other than your kohaku, how many kois are showing the same symptoms of jumping? Flashing or flicking means your kois are rubbing themselves against the bottom or side of the pond. This means they are infected with parasites which are irritating them. The more often they flash, the more parasites are on their bodies. Any of your kois have raised scales like a pine cone? If so, together with the bulging eyes, it could be dropsy which is fatal to your kois. I am not scaring you but making you as informed as possible.
I suggest you do an immediate change of water, up to 30-40%. This will dilute some of the toxins in there. Quickly give us the measurement of your pond in order for us to work out the amount of salt required to begin the most basic medicating process. You need to have 0.3% salt salinity to really kill off these nasty bugs.
Charcoal is a good temporary measure for absorbing ammonia and/or nitrites but this is not a long term solution.
Can you do the change of water first (remember to dechlorinate) and get back to us on the rest of the info we need? Hope your fishes are not getting any worse!