Question
hi there, i have a 300 gallon indoor pond which i made about 1 month ago, my koi keep dying one by one for some odd reason, if i leave the dead fish in there, no fish dies until i take it out?  I put stress coat and all that good stuff and have a pump and so on, why is this?  I do not want to lose anymore koi in my pond...they also seem to be getting this internal bleeding it look like because i can just see red on my ghost koi.  Can you help me out here, maybe the pond needs to settle down which takes some time for the pond to mature? any suggestions???

Answer
Hi Ponchai,
Have you notice if the fish are fighting?  How many fish are in the pond and how large are they?  They may be overcrowded and are nipping and fighting with each other.  What are you feeding them?  Indoor temperature?  What kind of light?  Any plants in the pond?  Any other creatures in the pond besides the koi?  Please let me know.
thx,
Tom