High Nitrates after 50% water change, pls help! ( New Tank)

Fer21

Member
View Badges
Joined
Jun 10, 2016
Messages
24
Reaction score
4
Hi,

I'm setting up a new tank its 15g, I been cycling since February 16th ( Coming up to week 6), I started by adding a raw shrimp and I let it decompose, it took a bit to build up ammonia after i had build up ammonia I took it out and I started adding Microbacter7 after one week i switch to MicrobacterSTAR XLM, all was going fine I had spike in NH3, then N02 and i started to build up Nitrates.

I was waiting for Nitrite to go down for the longest time, I read that Nitrites did really matter too much so I stop worrying in getting it to zero, my concern was Nitrates they were reading 100(Salifert), so last sunday I did a 10% water change to lower nitrates( by this point I had stop adding MicrobacterStartXLM and added MC7 again just once) but it didn't do much and the next day I got and bacteria bloom ( I think) which was gone in one and half days, yesterday I did another water change 50%, I tested and here are the results:

90782978_247940309568976_9212122967750737920_n.jpg
90528984_263794931293271_1976926966212722688_n.jpg


Ph: 8.0-8.15
NH3: 0.00ppm
NO2: 1.0ppm (which was lower before water change 0.1)
NO3: 100ppm(salifert)( I had an API Nitrate test laying around and use it to confirm but that does not measure the same, its way lower but I'm not really trusting the API since its really old)

During the water change I did stir up the sand bed a little which next day got another bacteria bloom or just stir up water but its clearing up now ( 1 day after), but it keeps reading high nitrates even after the 50% water change, I'm not sure what keep elevating my nitrates, rock or sand and i'm not sure how to solve it, maybe 100% water change?

I don't have any livestock yet but I do have a pair of clowns arriving this saturday, would it be safe?
any help would be appreciated!

FTS:

IMG_5032.JPG
 
Corals.com

Mr.Z

Member
View Badges
Joined
Jan 23, 2019
Messages
67
Reaction score
65
Although you were getting a reading of 100 for nitrate, it was likely higher and that is just the maximum the test can show. So you may have dropped from 300 to 150, but for both of those levels your test kit would read 100.

I’d recommend another large water change, possibly greater than 50%.

However, I’m new to the hobby so you may want to wait for more people to chime in.
 

Hercaluis

Member
View Badges
Joined
Aug 10, 2019
Messages
62
Reaction score
27
Hi,

I'm setting up a new tank its 15g, I been cycling since February 16th ( Coming up to week 6), I started by adding a raw shrimp and I let it decompose, it took a bit to build up ammonia after i had build up ammonia I took it out and I started adding Microbacter7 after one week i switch to MicrobacterSTAR XLM, all was going fine I had spike in NH3, then N02 and i started to build up Nitrates.

I was waiting for Nitrite to go down for the longest time, I read that Nitrites did really matter too much so I stop worrying in getting it to zero, my concern was Nitrates they were reading 100(Salifert), so last sunday I did a 10% water change to lower nitrates( by this point I had stop adding MicrobacterStartXLM and added MC7 again just once) but it didn't do much and the next day I got and bacteria bloom ( I think) which was gone in one and half days, yesterday I did another water change 50%, I tested and here are the results:

90782978_247940309568976_9212122967750737920_n.jpg
90528984_263794931293271_1976926966212722688_n.jpg


Ph: 8.0-8.15
NH3: 0.00ppm
NO2: 1.0ppm (which was lower before water change 0.1)
NO3: 100ppm(salifert)( I had an API Nitrate test laying around and use it to confirm but that does not measure the same, its way lower but I'm not really trusting the API since its really old)

During the water change I did stir up the sand bed a little which next day got another bacteria bloom or just stir up water but its clearing up now ( 1 day after), but it keeps reading high nitrates even after the 50% water change, I'm not sure what keep elevating my nitrates, rock or sand and i'm not sure how to solve it, maybe 100% water change?

I don't have any livestock yet but I do have a pair of clowns arriving this saturday, would it be safe?
any help would be appreciated!

FTS:

IMG_5032.JPG
it’s way too early to add clown fish.....what are your Alk levels? ....the best thing to do is add a chromis Since they’re inexpensive.....nitrates aren’t the issue for fish....it’s actually ammonia and nitrites those can kill your fish
 

Silverfish

Valuable Member
View Badges
Joined
Jun 13, 2018
Messages
1,778
Reaction score
1,684
Location
Candler
So I think the problem is you don’t have enough nitrifying bacteria in the tank due to it being so young. No matter how many water changes you do they will quickly increase. Perhaps adding some Dr Tim’s will help you add more of the beneficial bacteria which will lower it in time.
 

Crustaceon

Active Member
View Badges
Joined
Feb 15, 2019
Messages
448
Reaction score
750
Siphon the sand and do a 75% water change. What beneficial bacteria is there will remain in the sand and rocks. Keep dosing beneficial bacteria for the next week or so to ensure the population is sufficient enough to denitrify. Also, stay on top of your weekly water changes (10-20%) once the clowns go in, just so the nitrates won’t have much of a chance to creep up while the bacterial population establishes, which can take months.
 

lapin

Valuable Member
View Badges
Joined
Dec 16, 2017
Messages
5,718
Reaction score
12,054
Location
Austin
If you have nitrates your tank is cycling just fine. 6 weeks with the rock and sand you should have a good ammount of bacteria. As Crustation just said do a big water change, wait 24 hours and test nitrate. You really want to start with around 10ppm. This will help keep algae at a reasonable level as your tank starts on its way to becoming fully mature. As long as you dont have ammonia and nitrates are at a reasonable level the clowns will be fine. With a new tank its always good to have prime on hand in case of an ammonia spike.
 

Phycodurus

Well-Known Member
View Badges
Joined
May 18, 2018
Messages
564
Reaction score
957
Location
Los Angeles
the best thing to do is add a chromis Since they’re inexpensive
i respectfully disagree on the chromis option simply because “they’re inexpensive.” cost doesn’t mean one type of fish or invert is more expendable than another (IMHO anyways).

patience is key while the tank continues to stabilise.
 
OP
Fer21

Fer21

Member
View Badges
Joined
Jun 10, 2016
Messages
24
Reaction score
4
Siphon the sand and do a 75% water change. What beneficial bacteria is there will remain in the sand and rocks. Keep dosing beneficial bacteria for the next week or so to ensure the population is sufficient enough to denitrify. Also, stay on top of your weekly water changes (10-20%) once the clowns go in, just so the nitrates won’t have much of a chance to creep up while the bacterial population establishes, which can take months.
I would do that, thank you!

If you have nitrates your tank is cycling just fine. 6 weeks with the rock and sand you should have a good ammount of bacteria. As Crustation just said do a big water change, wait 24 hours and test nitrate. You really want to start with around 10ppm. This will help keep algae at a reasonable level as your tank starts on its way to becoming fully mature. As long as you dont have ammonia and nitrates are at a reasonable level the clowns will be fine. With a new tank its always good to have prime on hand in case of an ammonia spike.
Ok, I would do the water change and see where my nitrates go, thank you. Ammonia has been at zero for like 3 weeks.
 

Do you have any coral frag mounting tricks or tips you have learned that really help you?

  • Yes I have learned some tricks (please share in the thread)

    Votes: 9 20.5%
  • No but I would like to learn some (check the thread)

    Votes: 26 59.1%
  • I don't frag corals

    Votes: 9 20.5%
  • Other (please explain)

    Votes: 0 0.0%

Online statistics

Members online
2,454
Guests online
5,447
Total visitors
7,901
Top