Great update guys. New media is always a pain how it floats when brand new. A trick I was taught with sturgeon is to put a length of pipe into the pond near the sturgeon and drop the food down the pipe, that way the koi can’t see the food sinking
The water that is already in the pond is already dechlorinated so we were only dechlorinating what was being added , and for ammonia it makes sense thinking about it ,a quarter of a teaspoon for every 300 litres that would be a lot of prime safe for 13000 litres? Since adding the k1 and the small water changes ,the parameters have improved