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Old 11-17-2012, 01:18 PM   #1
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Minicycle has begun...

After my ammonia spiked about 2 weeks ago my 2 remaining tiger barbs started sort of a fish-in minicycle. my ammonia is at .25-.50 ppm but I'm worried about the nitrites as they're at 5 ppm. At what point do nitrites become lethal to tropical fish?
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Old 11-17-2012, 01:45 PM   #2
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NitrAtes at 30 ppm
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Old 11-17-2012, 03:55 PM   #3
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You want to keep your nitrates under 20ppm so all you need to do is a 50% WC to bring your numbers down and keep testing like you've been doing.
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Old 11-17-2012, 04:14 PM   #4
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Quote:
Originally Posted by FeldmansFish
After my ammonia spiked about 2 weeks ago my 2 remaining tiger barbs started sort of a fish-in minicycle. my ammonia is at .25-.50 ppm but I'm worried about the nitrites as they're at 5 ppm. At what point do nitrites become lethal to tropical fish?
If I understand correctly nitrites are as dangerous as ammonia so a 5 reading is very dangerous. I'd do a couple 50% water changes to get them as close to 0 as possible.
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Old 11-17-2012, 04:16 PM   #5
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He's talking about nitrates not nitrites.
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Old 11-17-2012, 04:19 PM   #6
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Quote:
Originally Posted by Rivercats
He's talking about nitrates not nitrites.
In his 1st post he said his nitrItes were at 5 & in the 2nd his nitrAtes were at 30.
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Old 11-17-2012, 04:31 PM   #7
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Yep, sure did, missed that with the whole nitrate issue. Good catch.
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Old 11-17-2012, 05:06 PM   #8
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Water changes are definitely needed to get your nitrites under control (.25ppm or less). Nitrites affect fish at a cellular level by preventing oxygen from being absorbed into hemoglobin (red blood cells) so a fish's body is basically starved of oxygen. Oxygen deprivation causes brain damage, organ damage and a host of other issues at a cellular level. You may not notice obvious effects initially but the damage can cause health issues and demise that may not be apparent for weeks, months or longer.
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