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Old 05-06-2011, 02:59 AM   #1
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Why do my corals keep dying??!

Hello =]
I've had my tank established for over a year and have had the same fish for probably around 8 months. Its a 29 biocube. No nitrates or ammonia, pH is 8.6 (a little high) salinity is .026. I've managed to kill a plate coral and a frag of some type of polyp. I have done research and am trying to figure out what I am doing wrong but cannot... I just put two frags in. One is frogspawn and the other is honestly something I cannot remember. Please excuse my ignorance as I am very new to coral and am trying to get it right. I have two percula clowns, a pink skunk clown, small hippo tang, four large turbo snails, peppermint shrimp, emerald and hermit crabs and a sand sifting star. So far the frogspawn looks good but the other one is pretty withered... Please help me keep it alive!!
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Old 05-06-2011, 03:00 AM   #2
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I do have phoszorb in the filter and a protein skimmer.
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Old 05-06-2011, 03:48 AM   #3
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How close are your corals? They're both somewhat aggressive and have sweeper tenticles which could inflict damage to eachother. What kind of lighting do you have? Waterflow? Have you tried moving the corals? Sometimes they like to be lower/higher in the tank. FYI: Im surprised you haven't heard from them yet, but I'm sure the tang police is going to get you for keeping a hippo tang in a 29g.
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Old 05-06-2011, 09:16 AM   #4
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You really need to address the tang in a 29 gallon tank before you do anything else. LOL

What are you water parameters? Ammon, nitrite, nitrate, calcium and phosphates. Do you use tap water or ro/di water?

And I'm dead serious about the tang.
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Old 05-06-2011, 09:43 AM   #5
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And I'm dead serious about the tang.
Says someone with a mandarin in a 29


But please answer her questions. We need to know all the water parameters as well as your LIGHTING!

Type of lights (T8/T5/CFL/MH/LED. etc.), make and model, how many watts each bulb/fixture produces. What is the spectrum or K value of the lights, what is your on/off time, how many hours per day are the lights on, how old are the bulbs....
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Old 05-06-2011, 01:43 PM   #6
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Thank you for responding!! I will swap out the hippo tang. I have the lights that come with the biocube. I just replaced one of the bulbs. They are by coralife. One of them says 10,000k 36 watt and the other is an "actinic bluelight" compact fluorescent 36 watt. Both are 36 inches. When they turn off, 3 blue LEDs turn on. I have the lights on a timer so that they are on for seven hours. I'm assuming the waterflow is standard for a biocube because I don't know how to adjust it. If I put the coral directly infront of it, you can tell the flow is pretty strong. I am trying to post pictures of everything but am on my iPhone.
Nitrates, nitrites and ammonia all at 0.
Salinity is .026 and pH is 8.6 (a little high)
I'm not sure about phosphates as I haven't tested for that in a while but I have phoszorb in the filter.
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Old 05-06-2011, 01:50 PM   #7
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Yeah, that tang needs to come out asap, not to be mean. I'm surprised its still doing ok but trust me he will grow like a monster. lol

I also have the same cube and the lighting should be fine for growing basic corals. Even some higher light ones if placed right. Do you have a powerhead also in there? Maybe you are getting too much flow?

also do you test for calcium? how do you get your water? do you buy it premixed or buy ro water? Or are you using tap water?
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Old 05-06-2011, 01:56 PM   #8
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I don't have a powerhead... Haven't gotten it tested for calcium in a while but was just headed to a store so I will bring a sample with me to be tested. For water changes, I use salt water from a fish store. To replace water when it evaporates, I use tap water with prime.
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Old 05-06-2011, 01:59 PM   #9
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Ahh that could be a problem with your corals. I woudl really suggest buying a 5g jug or so of RO/DI water for your top offs. And you might wanna invest in your own test kit, API liquid test kits are really pretty reliable. Would save you from having to go to the lfs.
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Old 05-06-2011, 06:25 PM   #10
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To replace water when it evaporates, I use tap water with prime.
Tap Water in the Saltwater Reef
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