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-   -   nitrites after a month and a half? (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/nitrites-after-month-half-82389/)

KendraMc 09-30-2011 01:23 PM

nitrites after a month and a half?
 
my tank has been set up since early august. i used the filter material from a cycled tank. the cycle finished and has been stable for over a month. nothing has changed except i removed a fish and the filter sponge into a hospital tank. the sponge was put back on tuesday. last thursday there was 0 ammonia, 0 nitrite and 10-20 nitrate. oh, and i added a bunch of water sprite to the tank on a week ago. today i tested my water before doing the change and now i have 0 ammonia, .25 nitrite, and about 30 nitrate (hard to say for sure, redder than 20, not as red as 40). doing a larger water change than usual.

would having taken the sponge out for a few days have caused this?

would dead plant matter do this? i have had some wisteria die and haven't gotten it all out of the tank yet.

what else would have?

brownmane 09-30-2011 03:21 PM

The water sprite should help with the nitrite levels. Myself, I would just do a partial water change and see what that does:-)

Byron 10-01-2011 11:26 AM

Removing the sponge from the filter probably caused the increase in nitrite; depending upon the tank setup and given the short time, a considerable colony of bacteria probably went with the sponge.

Nitrates are another matter, and while much less serious, are still a concern as they are somewhat toxic to most fish even at low levels. The plants and regular weekly water changes of 40-50% of the tank should keep these in check.

KendraMc 10-07-2011 02:23 PM

so, this week i have .5 ppm ammonia, .25 nitrite, and about 40 nitrate. nothing has changed in that tank in the last week. any idea why i'm getting these readings now?

Byron 10-08-2011 10:27 AM

You have tested your tap water (on its own) for ammonia and nitrite and nitrate?

KendraMc 10-08-2011 11:59 AM

Quote:

Originally Posted by Byron (Post 854554)
You have tested your tap water (on its own) for ammonia and nitrite and nitrate?

yup, 0 for all of them.

Byron 10-08-2011 05:02 PM

I gather there are no fish in this tank, just plants. What was the ammonia source to initiate the cycling?

KendraMc 10-08-2011 05:38 PM

no, there are fish, this is my 29 gal with 2 swords, 9 tiger barbs, and a pleco, as well as a handful of plants. i had a different set up since may, redid everything except the filter in late July, and have had no ammonia or nitrite readings most of august and most of september, with all of these fish in the tank. then last week i had nitrites and now i have ammonia too. it had been cycled and stable for over a month.

KendraMc 10-14-2011 11:41 AM

today: .25 ammonia, 0 nitrites, about 30 nitrates. still don't know why i have ammonia.

i am going to go buy some more plants today in hopes of keeping the nitrates down. val and swords probably. not necessarily the quickest, i know, but i don't want more floating plants and i'm going to be done with stemmed plants for a while.

Byron 10-14-2011 12:02 PM

Quote:

Originally Posted by KendraMc (Post 861612)
today: .25 ammonia, 0 nitrites, about 30 nitrates. still don't know why i have ammonia.

i am going to go buy some more plants today in hopes of keeping the nitrates down. val and swords probably. not necessarily the quickest, i know, but i don't want more floating plants and i'm going to be done with stemmed plants for a while.

Good choice with plants, those should manage well and are moderately fast growing.


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