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Old 11/09/2021, 09:01 AM   #1
JurisHP
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Help With Dying Fish!

Over the past 2 weeks, I have lost most of my fish. Gem Tang, Purple Tang, 2 Yellow Tangs, Sohal Tang, Tomato Clown, Wrasse, Powder Blue Tang and a Hippo Tang. When this first started happening, I thought it was Ice, but the fish didn't look like they had been infected with that. Their skin was kind of peeling off, and they looked "cloudy" if that makes sense. I tested my parameters, and was shocked to find that my Nitrates were off the charts high. I started doing major water changes....30 gallons/day for days...that seemed to have stopped (well, slowed) the deaths, but I am still losing fish...I am down to 2 fish left. I tested my Nitrate again today, and it is reading 75...maybe my tester (Hanna's new testing device), doesn't read above 75, so it may be even higher than that! I can't imagine why my Nitrates are so high and won't come down.l I use RO/DI water exclusively, dose NoPox (well, just started that a few days ago)....I had a MarinePure block in my sump which I removed...I just don't get it.

One wild card....I took my Ca Rx offline for 2 weeks, as my Ca/Alk was out of balance. Once I got it in balance, I fired it up again...but the water in the reactor was sitting there not being circulated for that 2 weeks....I didn't refill with new water before firing it back up. Just thought I'd mention this.

Any thoughts? I am of course devastated at the loss of life, but will keep on keeping on...I of course won't add any new fish until I solve this very perplexing issue.

Any help is GREATLY appreciated.


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Old 11/11/2021, 07:31 AM   #2
Reef Bass
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Ammonia spike? Dead fish somewhere?


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Old 11/11/2021, 06:59 PM   #3
thorbradshaw
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Where you located? Maybe you should put the fish in a temp tank with fresh salt water and do changes everyday till you figure out your water parameters?


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Old 11/12/2021, 03:45 PM   #4
Sk8r
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Move living fish to quarantine with pure uncycled (mixed 8 hours with a pump) salt water. Top off every time your parameters leave 1.024 salinity and keep it clean. Do not feed more than fish will eat in five minutes. Siphon all remaining food out. Meanwhile give us a full range of parameters on your tank: salinity, alkalinity, nitrate, nitrite, ammonia. What size tank are we dealing with? can you give us specifics on your set-up. As to a permanent answer on the nitrate/nitrite situation, you may need a bigger, tougher skimmer. I battled high nitrate until I got a skimmer way more potent than the one I was working with. The nitrate has been totally manageable after that. We're talking under 10. That's one zero.


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Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low.

Current Tank Info: 105g AquaVim wedge, yellow tang, sailfin blenny,royal gramma, ocellaris clown pair, yellow watchman, 100 microceriths, 25 tiny hermits, a 4" conch, 1" nassarius, recovering from 2 year hiatus with daily water change of 10%.
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