larz1
Koi Kichi
Jun 21, 2007, 7:12 PM
Post #8 of 10
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Your ammonia levels are very high, and probably the cause of your fish dying. It is likely that the gills on your fish were burned by the ammonia at those levels, especially with the weather being warm. I suggest that you stop feeding immediately and get more water tests done.
You said your water is clear, so your filter must be cleaning the solids out of the pond, but not cleaning up the invisible wastes like ammonia, nitrite, and nitrate. You need to run more tests and start doing some pretty big water changes. If it is possible you should start running a trickling overflow water change of at least 500-600 gallons per day until the ammonia levels are much lower. According to your pond size you have about 5600 gallons of water so 10% fresh water per day should help, and don't forget to dechlorinate.
We will also need more tests. Especially your kh readings. By this time of year your water is warm enough that your biofilter (assuming it is big enough) should be working well, but with those ammonia levels it is not. Your water may be low on carbonates, which will starve the biological filter and keep it from doing its job. Pictures of your pond and filter would be very helpful in figuring out why the readings are so high.
Along with Kh, we need new ph, ammonia, nitrite, and nitrate readings. Test in the morning and the evening. It would also be good to know what those same test results are on your tap water. For the tap water, test it straight from the tap, and also after the water has been dechlorinated and settled in an open container for a few hours. In most cases the ph will be lower from the tap.
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Re: [choy] filter system
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