[VeronicaM]

My pond is about 2000 gallons. We had twelve koi who have been with us since last summer.
I tested the pond at about 10am. Nitrates were normal, GH was 75, KH was 70 and pH level was 6.8. I use a Cal bio filter, have a waterfall and an aerator. The last water change was two weeks ago. I cleaned the filter on Saturday afternoon. I used no chemicals....just washed them off with the hose. The only other thing I can think to mention is the plants dont look so hot either.

Things were actually going really well with the pond. In fact this week several of the fish were spawning. I removed one of the females and put her in a kiddie pool filled with water right from the pond. She laid eggs all over the aerator and artificial plants. I waited a day and put her back in. Some of the other female look bloated so I took them out as well but when nothing happened after three days I put them back in the pond.

I suppose I just feel totally defeated. I spent to much time working on the pond and caring for those fish. They brought so much serenity to my life.

Vee

Quote: Originally Posted by JasPR First of all, I'm very sorry for your loss. It will hurt for a while but I hope you are able to get back on the horse after some time has passed. And I'm sure you don't want to hear this right now but it is important to know why this happened so that you can learn from this painful lessons and add it to your experience memory bank. Unfortunately, this is how many of us learned koi keeping- one problem at a time. It sure does sound like a pH crash. But you said you tested the water and it was fine? What was the pH when you tested. And what was the ammonia and the nitrate? What was the water temperature? How many fish did you have and what is the size of pond? What type of filters do you have? When was the last water change and do you use a prefilter on water entering your pond? JR