I would like more details.
1. Are dying fish bass, BG, catfish or other spp?
2. Original fish, correct? Thus they are 9 yrs old.
3. You mention 7 dead yesterday, 3 dead today. Are fish dead in the morning when you get up or evening when you get home?. Of originals how many were stocked?
4. How big is pond and how deep? Any amount of rooted weeds or FA? Volume estimate in gallons or acre ft?
5. Aquashade used?
6. Water clarity - visibility?
7. Fertilize plus feeding?
8. Any water shed supplying this pond? Recent rains?
9. Any chemical treatments in last month?
10. Pump runs 24 hrs?
Note - in my experiences rarely are pond builders experts at managing ponds and fish. It is like going to an ear nose and throat specialist for thyroid or ulcer problems, Or going to a dentist for treating appendicitis or kidney stones.
