Lost almost everything - Aquarium Forum
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post #1 of 4 (permalink) Old 12-26-2015, 01:48 PM Thread Starter
 
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Lost almost everything

Replaced MJ-1200 s with Koralia Evo 850 s. After running just for few hours I lost almost all fish, half of my snails.
Here is a little more on what happen.
Either the wider more diapered flow from the Evo injured or stirred up something from sand bed that damaged swim bladders of fish. The lucky fish got trapped under the live rock and died a lot faster than one that where not trapped. Over next 48 hours lost about half of my snails. Only thing to survive where banded snails, one Azure Damselfish, Orchid Dottyback, and all three of my shrimp.

This of course happened on a day where I worked 9 hours in left work dealt with this when I discovered this when I got home, and had to go back to work for another 5 hours after my 3 hour "break" in between.

When I discovered this, only had two damsels left, basslet, dottyback, one surviving Astraea, Turbo, Nassarius, five banded , Fire Shrimp, two Scarlet Skunk Shrimp. I had to remove most of the live rock to get all dead fish. I put the fish and snails into QT, but did not move the shrimp as I figured they would die from the ammonia spike, I also put back the snails. Did 50%+ water change. Put back live rock. One damsel died 3 hrs latter after discovery, leaving one damsel, basslet, and dottyback in QTs. 8hrs after I discovered the basslet died. Turbo and Astraea died 24hrs latter. I left remaining damsel and dottyback in QT until they where swimming and eating normally which took 5 days. So far everything is good with the remaining livestock.

Maybe I should have left them in QT longer, do another 50% water change instead of going back to 10%. What would some of more experienced people have done?

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post #2 of 4 (permalink) Old 12-26-2015, 03:52 PM
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Re: Lost almost everything

Something else had to go wrong, you removed a powerhead that put out 1300gph and replaced it with one that only puts out 850gph. Something else went wrong there, I've never heard of a powerhead killing anything just because of flow.

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post #3 of 4 (permalink) Old 12-26-2015, 04:54 PM Thread Starter
 
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Re: Lost almost everything

Had to be something nasty in the sand bed that caused swim bladder disease that MJ didn't stir up. Hydor hasn't replied yet to my emails yet. If it was from contamination from pump that wasn't washed off by rising off before install, I doubt I would be only one losing fish right now. Plus they are still sitting in the tank off with only ~70% water changed now with two surviving fish and shrimp, so I think that rules out toxic contamination.

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post #4 of 4 (permalink) Old 12-26-2015, 07:05 PM
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Re: Lost almost everything

I've stirred my sand bed up on purpose before, numerous times, I've never had anything die from doing it. Like I stated, one was 1300gph, the new one is 850gph, very different flows, one extremely lower than the other.

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