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Old 08-10-2009, 12:54 AM   #1
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Nitrates at ~30ppm

OK guys, I have had my nitrates at ~30ppm for several weeks now and everybody seems to be doing fine. I have done 2 water changes in 3 weeks and I dont know why they arent going down...Any suggestions? My livestock is doing perfectly fine though so IDK.

The only thing is...I got my two clowns last week and after 5 days found them dead. I have no idea why. I took them right out and checked all my params...

pH = 8.0
Nitrites = 0
Nitrates = ~30
Ammonia = 0
Alkalinity = 180
SG = 1.023

Also, everything else in the tank (fish and inverts, including my CC sea star) are perfectly fine and enjoying life. I called the LFS where I got them from (not the usual LFS that I use) and they told me that it could have been do to the fact that they were a new shipment (they failed to tell me this when I got them) and could have gotten sick or something during the shipping. Could it have been anything with my tank or is it them??
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Old 08-10-2009, 04:49 AM   #2
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That 180 alkalinity is in what units and using what test brand? Is it in ppm's or dkh or meq/l?
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Old 08-10-2009, 09:18 AM   #3
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That 180 alkalinity is in what units and using what test brand? Is it in ppm's or dkh or meq/l?
It was in ppm and I cant quite remember the brand off hand (they are test strips).

Do you think its better to use test strips or liquid tests?
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Old 08-10-2009, 09:24 AM   #4
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Dropping nitrates is like doing a math problem. If your nitrate is at 30ppm and you do a 20% water change with RO/DI water that has 0 nitrate, the level in your tank will drop to 24. Assuming they don't rise for your next water change, 24ppm with 20% change will drop to 19 and on and on.

Your alk is fine. 180 ppm = 3.6 meq/l = 10 dKH
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Old 08-10-2009, 09:26 AM   #5
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Dropping nitrates is like doing a math problem. If your nitrate is at 30ppm and you do a 20% water change with RO/DI water that has 0 nitrate, the level in your tank will drop to 24. Assuming they don't rise for your next water change, 24ppm with 20% change will drop to 19 and on and on.

Your alk is fine. 180 ppm = 3.6 meq/l = 10 dKH
Thanks ccCapt, are the nitrates alright though? I mean, Im pretty sure they are and all the inhabitants are doing and have been doing fine with the small exception of the clowns which Im pretty sure was nothing to do with my tank...
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Old 08-10-2009, 09:28 AM   #6
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30ppm is fine for fish, but may cause problems for some coral.
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Old 08-10-2009, 09:29 AM   #7
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30ppm is fine for fish, but may cause problems for some coral.
Ok well thats good for me then because I have a FOWLR
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Old 08-10-2009, 01:46 PM   #8
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I agree with Larry. If only fish then you`ll be OK. For corals you are talking a different story.I am kind of concerned for your inverts though.
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Old 08-10-2009, 02:36 PM   #9
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I agree with Larry. If only fish then you`ll be OK. For corals you are talking a different story.I am kind of concerned for your inverts though.
Hmm, well inverts seem to be doing excellent and the nitrates have been like that since I got the tank started therefore the inverts have been in it for about 5 weeks now. I will do frequent water changes if thats what it takes.
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Old 08-10-2009, 08:29 PM   #10
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Try to think back and see if you can come up with "Why" your nitrates are that high in the first place.
Check your source water, check your feeding, check the bioload of your tank...maybe max out your tank. you may need more flow, an HOB to scurb your water once a month or so. You might have to syphon a 1/3rd of your sand to help the CUC catch up with the load. The list goes on but I think you get what I am trying to say..."Find the problem" and it will be easier down the road when you decide to venture into a reef setup.
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