pH - matured ponds
Sunday, June 1, 2008
A couple visited us (31 May) asking questions about their koi dieing over the last 10 days - 4 pieces of fairly big size of over 40 cm long!
I visited the couple's home at nearby Impian Emas. Upon checking the water, the pH was at an acidic level of 4.9 and the ammonia level was slightly raised. The filter chamber runs without coral. Coral is a very good media for filter chamber as it moderates pH towards akaline level and also acts as bacteria houses.
As one of the several surviving koi in the pond was in distress, 30% water change was recommended. At the same time, coral was introduced to the filter chamber. Feeding of the koi was stopped for 5 more days and close monitoring of pH was carried out.
For this episode, likely the koi died due to the raised ammonia level as given the pH of 4.9, bacteria would have been destroyed and not present to 'clear' the ammonia.
PH Ong / KK House
8:00 AM |
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