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Old 06-27-2005, 08:05 AM   #1
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Nitates high......What should I do?

My story is: A feww weeks agaon i had just about everything die off in my tank. 75gal FOWLR. Not sure if it was because i stirred all the sand at the bottom or what. But eveything died but the snow eel. After a couple of weks the eel is fine and the readings are great. So I pick up 4 damsels. They are fine for a week and the readings are great. i pick up a very small lion fish and a little puffer, readings are still great. Now 5 days later I check the readings and all are fine but the nitrate. they are way way up there. Basicly the worst reading on the rea sea chart. So I doa 20gal water change. I wake up today, a damsel is dead. Nitrate reading still very high. what should I do, and what can I do? HELP

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Old 06-27-2005, 08:25 AM   #2
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for one thing, you are adding too much too fast.

Do water changes daily until this is back under control.
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Old 06-27-2005, 11:45 AM   #3
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Thanks, How much water should I checnge on a daily basis?
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Old 06-27-2005, 12:06 PM   #4
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I agree about adding fish too fast. In the future I'd also recommend checking water as you add the fish, not after they die. That'll tell you if water changes are needed also before problems occur.

A puffer and a lion only 1 week after 4 damsels was asking for problems. I know this a very exciting hobby and we all want fish in our tanks, but maybe this experience will be remembered. Also make sure your water is aged for a day or two.
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Old 06-27-2005, 08:48 PM   #5
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Also what are you feeding and how often?
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Old 06-27-2005, 10:03 PM   #6
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Do at least a 50% water change
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Old 06-27-2005, 11:22 PM   #7
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Whoah not a 50%.

Try a 25% or so.
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Old 06-27-2005, 11:29 PM   #8
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50% water changes won't hurt anything. This is what I did when my nitrates were to high to help get them down. I did large water changes every other day with RO/DI water since my tap had high nitrates also.
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Old 06-28-2005, 12:03 PM   #9
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What type of filtration do you have, LR, canister, sump?? Skimmer on the tank?
Remember when you do water changes to mix water for a least 24 hours before using and bring it up to temp. I would do more smaller 20-25% wc then 1 large one, IMO less chance of stressing the fish.
As you learned stiring the sand is not a good idea, why did you stir the sand???
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Old 06-28-2005, 12:23 PM   #10
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Smaller water changes would take longer to lower the nitrates. Say you have 100% nitrates. A 50% wc will bring them down to 50. 50% more 25%, etc. etc. 20% water changes will take your water from 100% to 80%, to 64% to 51%, etc., etc.
Normal nitrates may be kept under control doing 20% water changes but to lower high nitrates, larger changes are the only way to dilute it enough to make a difference. I had nitrates off the chart and this is how it was explained to me. The large water changes every other day had no effect on my fish or corals. Just have to be sure the temp, salinity and ph are all consistant. Good luck.
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