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Old 06-20-2013, 04:45 PM   #1
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Coral Dying, what am i Missing

I have an 80 gallon tank with 6 x 54w t5 lighting.
Fish are all doing fine
Sailfin Tang(he can't stay)
Blue Neon Damsel
Blue Chromis
2 clowns
lawnmower blenny and
the ever important black molly from when the tank first cycled.
I purchased the tank complete so it has been moved since the original cycle. Half of the original water was transported with the move. Using ro/di water for changes and instant ocean reef crystals.

Water
78-80 degrees
PH 7.5 - 8.0 having a hard time with the color chart, ordered a digital tester
Nitrite 0
ammonia 0
nitrate 15-20
kh 90
calcium 400
salinity 1.024

Needing to buy an iron test

Recently tried some corals and they all die within a couple days. Not sure what I am missing. Doing water changes to bring the nitrates down.
Lost a feather duster
Torch coral
palm tree coral
waving hand coral
and a frogspawn.

Not sure what is wrong, what am I missing. Bulbs are all brand new
Corals were acllimated for close to two hours.

Also 6 astrea snails died virtually instantly. Something must be way out but don't know what.

Thanks for any help.
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Old 06-20-2013, 05:04 PM   #2
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Have you noticed anyone picking on them? Also have you taken a water sample to your lfs to make sure to double check your water test results? Lighting looks ok for moderate light corals. There might be something in there we cant test for. Looks like some PWC's are in order.
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Old 06-20-2013, 05:57 PM   #3
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Quote:
Originally Posted by melosu58 View Post
Have you noticed anyone picking on them? Also have you taken a water sample to your lfs to make sure to double check your water test results? Lighting looks ok for moderate light corals. There might be something in there we cant test for. Looks like some PWC's are in order.
Nothing is picking on them. Forgot I have a cleaner wrasse as well. They look ok for a few hours and then begin to break down and shrivel away to nothing. "Local" fish store is unfortunately 5 1/2 hours away so testing from them is not easy at the moment. I've been questioning my test kits as well.
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Old 06-20-2013, 06:13 PM   #4
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Also been doing small water changes to lower nitrates. About 10 gallons at a time. Not wanting to making drastic changes if something is already wrong.
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Old 06-20-2013, 06:50 PM   #5
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Is it possible the previous owner medicated the tank with something still lingering around or something like that? Did he always just have fish?
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Old 06-20-2013, 07:06 PM   #6
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He had only fish for some time. He did give me some additives he had that he said I could throw in which I did according to the bottles. Now that you mention it I am wondering how old they were and if they had an expiry.
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Old 06-20-2013, 07:27 PM   #7
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I don't know if its the pictures but your water looks murky, what kind of filtration are you running? Them all dying like that is an indication that something is wrong for sure. With 80 gallons I'd do a 10 gallon water change every couple of days for a while to really clean it out. In the pics the rock work really looks green too, do you have a lot of algae? Not judging, just trying to get to the rout of the problem...
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Old 06-20-2013, 07:49 PM   #8
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Looks like base rock that is just starting to color up IMO, or is that the rock that came with it?
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Old 06-20-2013, 08:11 PM   #9
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Kh 90 would be about 4.9 dkh? Is that is correct your low alk would cause your corals to melt. Check your alk again and see if it's in the proper zone 8.4-12dkh.
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Old 06-20-2013, 08:19 PM   #10
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Do you have a sump? How do you maintain water level? How stable is temp and how many watts is heater?
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