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Old 01-17-2014, 04:01 PM   #51
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Originally Posted by GouldFever View Post
I'm beyond puzzled now
Same here. Another possibility that was mentioned was something leeching into the system. While I don't -think- this is the case, I will go through what happened since 2012.

-Dismantled tank, put all live rock in a 32g plastic container with air and heat.
-Reset tank. The only chemical used was Silicone to seal the bulkheads. No new silicone has been added since the day the bulkheads were installed back in December 2012 (give or take a couple weeks on exact date.)
-Since then, no rock has been out of the water.

Contents of the tank: 2 Marineland powerheads, 60lbs live sand (~1.25" average depth), ~125lbs love rock.
Contents of the sump: eshoops RS200 sump, 2 micron filter socks, skimmer, UV Sterilizer, 1 bag of carbon, foam bubble trap, 2 marineland return pumps.

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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Old 01-17-2014, 04:15 PM   #52
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The silicone is the only other thing that it could be. Unless the prolonged exposure to the voltage did something to the rock? Anyone? Bueller? Bueller?
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Old 01-17-2014, 04:27 PM   #53
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Forgot to add lighting info...

2x 48" Hamilton Technology Blue/White LED strips, 2x 24" Hamilton Technology Blue/White LED strips, 3x 6 watt LED night lights. All 7 items mounted to a marine varnished 1x6 suspended ~7" above the water line.

Again, nothing that -should- cause a problem.

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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Old 01-17-2014, 04:32 PM   #54
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Originally Posted by GouldFever View Post
The silicone is the only other thing that it could be. Unless the prolonged exposure to the voltage did something to the rock? Anyone? Bueller? Bueller?
I did check the silicone, it is all dry. It is marine grade as far as I know (bought the tube at my LFS) and it was used to seal bulkheads only. Might the next step be to remove any excess silicone on the bulkheads and reseal with a new tube?

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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Old 01-17-2014, 04:37 PM   #55
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I wouldn't do that yet......... Have you introduced any live stock into the tank with everything turned off? I'd turn EVERYTHING off and see what happens.
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Old 01-17-2014, 04:49 PM   #56
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I wouldn't do that yet......... Have you introduced any live stock into the tank with everything turned off? I'd turn EVERYTHING off and see what happens.
I did that last night. Everything was off. I let the damsels sit for about a half hour before I started slowly plugging items in to see if anything had an obvious effect on the fish. No one item produced the immediate effects observed on Wednesday evening with the Cardinal. This time, it was (I assume as I did not observe them for about 5 hours) a slower death (that sure makes me feel good its bad enough I can't keep anything alive...)

But...maybe something is emitting a charge periodically as opposed to continuously? Might try again tonight with everything off and just leaving everything off over night.

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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Old 01-17-2014, 05:06 PM   #57
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I was originally thinking it was your heater. It turns on and off periodically and could hit he fish after a while in he tank. What do you take from the dt and use in the qt? Filter, heater etc.
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Old 01-17-2014, 05:17 PM   #58
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I was originally thinking it was your heater. It turns on and off periodically and could hit he fish after a while in he tank. What do you take from the dt and use in the qt? Filter, heater etc.
Nothing is transfered between the two systems. The QT used water from the DT to set it up 10 months or so ago, but since then the two systems have not had any contact.

The QT consists of:

Standard rectangular 20g tank
Marineland Penguin over the back filter
Prizm over the back skimmer
50w heater (which I think is from my first fresh water tank in 05!)
Glass canopy w/plastic strip on the back removed for filter/skimmer clearance.
Standard fluorescent light strip.

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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Old 01-17-2014, 05:24 PM   #59
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Originally Posted by somethingsfishy View Post
I was originally thinking it was your heater.
Missed this first part. I replaced the heater last night. It did create a significant drop in stray voltage (from 4.1 to .7) and I also determined the .7 volts are coming from the two Marineland return pumps. I don't think less than one volt could hurt the fish, but if I am wrong I can replace those as well.

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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Old 01-17-2014, 07:43 PM   #60
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As I am looking through other forums to find other possible issues, one possibility came to mind with regards to the idea of an intermittent "live" charge OR a toxic substance being the culprit.

The two return pumps and the pump on the skimmer are all 13 months old, should be fine, but the pump feeding the skimmer is about 4 years old. If there is corrosion in that pump, could that create an intermittent live charge? Or, if there is corrosion, could it leech into the system making it toxic without showing any other evidence of trouble?

Don
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125 FOWLR (sans fish!) aka "Tank of Doom"
20 Saltwater QT: 1 perc, 1 bangai cardinal, 1 crab, 1 sandsifting goby, 1 sandsifter star, 1 cleaner shrimp.
90 Malawi Cichlid and 1 "Beta Blob"
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