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HELP!! Showing ammonia all of a sudden
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Joined: 17 Feb 2004

PostPosted: 2004.03.16(Tue)20:07    Post subject: HELP!! Showing ammonia all of a sudden Reply with quote

I have an 80 gal SW tank that's been up and running for about 9 months. We've been having a problem with our nitrates and have been trying to get them down. Our ammonia and nitrites have been registering 0 for months now. Last Friday I added a damsel and on Saturday he was no where to be found. We also had done about a 50% water change on Friday in hopes of conquering this nitrate problem. Today I checked my ammonia and it read .25 nitrite is 0 and nitrates are at 25ppm. My question is did I send the tank into a cycle and if so since this is an established tank with live rock could this be a small spike and will rectify itself quickly or could this be from the dead fish we never found? We moved all the rock and never found a trace of the damsel and are assuming he was eaten completely. I cannot move the fish into another tank so if this level goes up any higher what can I do? Any advice will be appreciate. Thanks!!
Please be patient with me!! I'm trying to learn
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Joined: 17 Dec 2003
Location: South Wales ( U.K)

PostPosted: 2004.03.17(Wed)13:42    Post subject: Reply with quote

It maybe the dead fish that caused the cycle !! Although you havent advised what fish and how many you already had in there it may not have been the dead fish but just the fact that adding another one into what you already had just pushed it over the limit !!

It is the amm you really need to worry about as this is the most toxic to fish .
I myself would say that a change of water twice over 3 days would do it - perhaps 20% each time.

.25ppm is not too high but you really need to get it down .

Loving my waterbabies ! Are you ?
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Joined: 07 Feb 2003

PostPosted: 2004.03.25(Thu)7:52    Post subject: Reply with quote

Doing the 50% change could have put it into a mini cycle, a salt water tank should never be changed over 25%. Unless its an emergency. Let the tank go until the water is stable again. If a fish did die if the tank is established it probaly wouldnt have made a difference. Most of the critters and bacteria will get rid of the fish quickly. With the lr it should straighten out fairly quickly. A damsel in a 80 gallon wouldnt not affect the tank like a damsel in a 10 gallon probably would. Also the nitrite part can be as leathel as the ammonia part. The best bet would be to ride it out.

As far as nitrates where do you get your water? Depending on where your water comes from it can contain nitrates before mixing. A lot of tap water if tested can contain nitrates and phosphates.
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