Have you salted yet chris? Normally you would not do water changes for nitrites and did you purposely drop ph or did it go down by itself?
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| Nitrites up to almost 5...should I do water change? http://byap.backyardmagazines.com/forum/viewtopic.php?f=45&t=24684 |
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| Author: | coachchris [ Apr 5th, '15, 08:06 ] |
| Post subject: | Nitrites up to almost 5...should I do water change? |
PH has dropped to around 7, Ammonia is at 0, but nitrites are creeping up to almost 5 now. Should I do a water change? I'm going to stop feeding for a few feeding and see what it does. I hate to do a major water change on the RAS. Even a 25% would require me to dump 1500 gallons and add 1500 gallons, essentially wasting 3000 gallons of water. |
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| Author: | 19disbre [ Apr 5th, '15, 09:33 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
Is this a new system |
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| Author: | Sleepe [ Apr 5th, '15, 17:03 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
Have you salted yet chris? Normally you would not do water changes for nitrites and did you purposely drop ph or did it go down by itself?
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| Author: | scotty435 [ Apr 5th, '15, 18:31 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
Up the aeration in your biofilter this will help the nitrification cycle convert the NO2 to NO3. Another option if you are using an MBBR is to temporarily convert it to a trickling filter if you're setup to do that like some have with their RAS setups. I'm not positive that second one will work but I'm pretty sure. |
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| Author: | coachchris [ Apr 5th, '15, 19:07 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
Yes on new system- I added Muriatic acid 2 weeks ago, but couldn't get PH down under 8. Left PH alone and it's drifting down over the last week. I have salted, but only to 1ppt, I'll add another 50lbs today. I have max aeration in mbbf. Thanks guys! Attachment: mbbr 3-28.jpg [ 29.59 KiB | Viewed 2164 times ] |
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| Author: | smatthew [ Apr 5th, '15, 23:18 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
Coach - here's some calculations that might help. Strive for a 10:1 Chloride:Nitrite ratio With a 5ppm Nitrite, that means 50ppm Chloride 50ppm Chloride in 6000 gallons is 2.5lb Chloride NaCl is 60% Cl. 4.2lb Salt Someone please check my math...... |
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| Author: | coachchris [ Apr 6th, '15, 06:13 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
I was using the link Ryan gave me; http://www.lagunakoi.com/Pond-Salinity-Calculator.html It says 50 lbs = 1ppt. I added 50 lbs so far, and was wanting to get another 1%. Didn't feed this AM and nitrites went down. I'm very close to cycling. I fed the fish lightly, and will keep monitoring. Hoping to add another 1000 late this week, early next week. Then need to get my breeding tanks in place. |
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| Author: | scotty435 [ Apr 7th, '15, 05:54 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
How are your Nitrite values now coachchris? The airflow may be a bit too much in that filter, you're trying to aerate the mix not remove the biofilm. |
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| Author: | coachchris [ Apr 7th, '15, 06:25 ] |
| Post subject: | Re: Nitrites up to almost 5...should I do water change? |
It was lower today Scotty. Going to check again in a bit...just got in from work and showered. Already headed toward 90 today. Too damn hot for this time of year. Good point about the mbbf. I'll adjust the air down. It may be too much. |
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