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Old 07-14-2005, 01:47 AM   #1
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nitrates reduction to no avail

hey all,
I have done four water changes in my tank, changed the reef carbon, added de-nitrate, and tuned my protein skimmer to be more efficient and my nitrates still read 20-30. I know that my test kit works because the nitrate in my R/O water is 0. I dont know where to turn. Please help.

TIA
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30 gallon SW tank;EHEIM ECCO 2235 Canister Filter w/Miracle-Working Chemi-Pure
TetraTec UV1 UV Sterilizer;Rio 50 Powerhead ;130w PC lighting;33 Lbs. of Tonga Branch LR;Nature's Ocean Live Sand (the bagged stuff)
Livestock:2-Ocellaris Clownfish;9-Scarlet Reef Hermit Crabs;1-Regal Tang;Zoanthids, Pineapple Brain coral, Sebae Anemone, Colt Coral, Galaxea
Tank Specs as of December 29, 2005:Ammonia:0;Nitrite: 0;Nitrate=0;Cu:0
PH: 8.3
SG: 1.028;Temp: 79-84 degrees F (Adjusts throughout the day)
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Old 07-14-2005, 07:59 AM   #2
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Frustrating, huh? I would still try a different style of test kit. More LR will not hurt the situation either. Do you have more then the 10lbs listed in your profile? A good goal for a 30gal tank is 45-60lbs. What is your feeding schedule?
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Old 07-14-2005, 08:42 AM   #3
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Cleaned your canister lately?
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Old 07-14-2005, 11:34 AM   #4
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I think it is the chemi pure...
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Old 07-14-2005, 11:36 AM   #5
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I think it is the chemi pure...
How so? I use chemi-pure and my NO3 are always well below 5. However, I do change out the bags once a month, not the recommended 4-6 months. I can see how that could cause problems.
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Old 07-14-2005, 11:45 AM   #6
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Yeah I'm guessing Hara's point is that older chemi-pure is going to become a bio-logical filter and thus a nitrate factory.

The SeaChem Marine Basic test kit includes a very good nitrite/nitrate test kit, far more accurate and smaller increments than other nitrate kits I've used (AP and Hagen)
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Old 07-14-2005, 11:49 AM   #7
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Yeah, that is what I figured. You really need to change them often.
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Old 07-14-2005, 01:45 PM   #8
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I have a FOWLR tank and my nitrates used to be around 20ppm when I only had 45lbs. base rock. Since I've added another 50lbs. of LR, over the last 2 months my nitrates have become undetectable to 5ppm. I changed nothing else in my tank.

HTH...
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Old 07-14-2005, 04:16 PM   #9
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and correct me if I'm wrong, but doesn't a good deep sand bed also help reduce nitrates? because de-nitrafying bacteria is all anaerobic, so it happens deep in the sand or live rock...right?
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Old 07-14-2005, 04:51 PM   #10
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well i did clean out the eheim, and i changed the reef carbon in there as well. i have added LR, just not enough. I added three pounds which is just a scratch. i rinsed the chemi-pure thinking that it would help. One question, when you change out the carbon, lets say my reef carbon, do you throw away the used carbon, or can you rinse it and reuse it? I have been using Aquarium Pharmecuticals and the test kit is two years old, but it says my tank has nitrates around 20-30, and the R/O has NO3 of 0. One wierd thing is that coralline has just grown crazy since i started adding calcium. How come it is spreading rapidly when the nitrates are so high? puzzling
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30 gallon SW tank;EHEIM ECCO 2235 Canister Filter w/Miracle-Working Chemi-Pure
TetraTec UV1 UV Sterilizer;Rio 50 Powerhead ;130w PC lighting;33 Lbs. of Tonga Branch LR;Nature's Ocean Live Sand (the bagged stuff)
Livestock:2-Ocellaris Clownfish;9-Scarlet Reef Hermit Crabs;1-Regal Tang;Zoanthids, Pineapple Brain coral, Sebae Anemone, Colt Coral, Galaxea
Tank Specs as of December 29, 2005:Ammonia:0;Nitrite: 0;Nitrate=0;Cu:0
PH: 8.3
SG: 1.028;Temp: 79-84 degrees F (Adjusts throughout the day)
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