Added goldfish and a koi to the pond

All the fish died after a few days!! Argh. Any ideas why? Tips?

Here is my pond when we first installed it (water is clear now) LOL.


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If you tossed that many fish into a small pond and it didn't have an established bio system, they probably died of oxygen starvation from the Nitrate levels.
Start with maybe 3 gold fish and wait till the water has established the bio element first. Then you can add more goldfish. 200 gallons is too small for even 1 Koi since they grow quite large.
 
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