Backyard Aquaponics
A place to discuss aquaponics

I have had 12 of my 75 channel cats die today. I brought a live one to a local fish store and he real doesn't see anything. No ich, no sores, no fungus. Lungs look good. Had him do a water sample and it was similar to mine. Ammonia 0 nitrates 45 pH7.8. all good. I am attaching links to 1 Youtube video that I took of the fish that were actively dying and 1 right after dying. Please give me a clue or too. I may just take the rest out and put them in a 35 gallon food grade bucket I got recently until i can figure it out. I just drained half of the water and added fresh water. Thanks in advance.

[youtube]https://www.youtube.com/watch?v=_7MkaOjPT4I&list=UUUwlv8IaiJJW2SeORIjoS1g/youtube]

[youtube]https://www.youtube.com/watch?v=aL9cW8q_aJc&list=UUUwlv8IaiJJW2SeORIjoS1g/youtube]

It's hard to tell by the video but I don't see a lot of surface agitation/aeration.

Are the surviving fish hanging out near the surface or gasping for air?

I was draining the tanks while filming. I pumped to water using the sub pump so no water was draining from the GB at that time. Lasted about 10-15 min. this morning the rest are dead. I'm going to drain the tank, clean it good and sanitize with bleach and let it sit for a while. Meanwhile, Im going to us a 35 gallon barrel to use as a FT. Ill just use some shiners or goldfish for the mean time. Question is should I remove the plants from growbed and start from scratch?

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It was interesting to read another members comments on his fish dying mysteriously..
at issue was the fact that his pump had developed an electrical leak, with the result of power flowing through the system.. Even if the fish were not "Electrocuted", I could easily imagine it would SERIOUSLY play with their "Lateral Lines " and all that stuff..

Did I read where another member disturbed a GB (Removing unwanted plants) and fish started to die.
There the suggestion was that he disturbed a noxious area of anaerobic muck..

Bottom line - if all looks "Normal" then is likely best to look towards the least obvious..
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Interesting. Never considered that as a possibility. I was thinking more of a neurotoxin. Either poison of some type or a neurological disorder. BTW I am at 100% mortality. Im cleaning the tank and going to soak it in bleach to kill everything. I had a guy recommend running the system with aquarium charcoal in a sock. This would absorb any chemicals that may be lingering.

I would think of a cat as similar to a carp/koi with very sensitive lateral lines.. ie designed for detecting prey by electrical detection.. ie.. electricity could be that neurotoxin..

NO idea about other fishes and now a AC field in the water could throw them off, but we know that salmonoids were bowled over by it (unless it was some contamination from the "Leaking" pump.
(The owner got a shock, when sticking his hand in the water... ..)
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