Nitrates and phosphates keep going up

AI Hydra

gabriel21946

Community Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 12, 2022
Messages
26
Reaction score
4
Review score
+0 /0 /-0
Location
new canaan
I am trying to see if I can get some guidance on this matter. I am almost about to give up. Everything I try doesn't help me get my NO3 and PO4 down. I currently have NO3 25ppm and PO4 .55. I have tried everything possible from gfo, to carbon dosing and can't seem to get them down. Currently I have a pax bellum n18, I dose tropic marin Elimini NP and I recently added a chemi pure blue and I try to do a 10% weekly water change and I still can't manage to get my mutrients low. Any other suggestions.
 

thatmanMIKEson

2500 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 10, 2021
Messages
2,913
Reaction score
2,385
Review score
+0 /0 /-0
Location
florida
I am trying to see if I can get some guidance on this matter. I am almost about to give up. Everything I try doesn't help me get my NO3 and PO4 down. I currently have NO3 25ppm and PO4 .55. I have tried everything possible from gfo, to carbon dosing and can't seem to get them down. Currently I have a pax bellum n18, I dose tropic marin Elimini NP and I recently added a chemi pure blue and I try to do a 10% weekly water change and I still can't manage to get my mutrients low. Any other suggestions.
Just curious is this a new tank?
Do you have sand?
Was this system started with live or dry rock?
What do you feed daily?
 
OP
G

gabriel21946

Community Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 12, 2022
Messages
26
Reaction score
4
Review score
+0 /0 /-0
Location
new canaan
Just curious is this a new tank?
Do you have sand?
Was this system started with live or dry rock?
What do you feed daily?
The tank is reaching a year now, I have a sand bed although I have been removing sand to keep it around an inch. I started with dry rock, they are starting to get some color to them and I mainly feed mice shrimp once a day and have seaweed for the tang fishes. Forgot to mention I have a 91 gallon tank
 
Partner Membership 2023

efilho

New Member
Review score
+0 /0 /-0
View Badges
Joined
Jul 4, 2021
Messages
10
Reaction score
47
Review score
+0 /0 /-0
Location
Rio de Janeiro
Tried many solutions for my 120gl and gave up: only water changes kept no3 levels as desired w/o side consequences and expenses (other than salt). In my tank the % of water changed means almost same % of nitrate lowered, then I run gfo in reactor until 16:1 no3/po4 ratio is achieved, which works for me. Average 30% water changed twice a month.
 
Last edited:
OP
G

gabriel21946

Community Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 12, 2022
Messages
26
Reaction score
4
Review score
+0 /0 /-0
Location
new canaan
What size protein skimmer do you have? How much algae growth do you get?
I have a nyos quantum 120, I also have a clarisea s5k roller, in the pax bellum the algae wasn't growing as expected so I recently completely changed the chaeto. I also just started to dose iodide once a week to help with the chaeto
 
Aquarium Specialty - dry goods & marine livestock

sixty_reefer

2500 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Nov 8, 2018
Messages
4,751
Reaction score
6,746
Review score
+0 /0 /-0
Location
The Reef
I have a nyos quantum 120, I also have a clarisea s5k roller, in the pax bellum the algae wasn't growing as expected so I recently completely changed the chaeto. I also just started to dose iodide once a week to help with the chaeto
That’s a fairly large skimmer, I would personally go back to the elemi-NP and follow the instructions, you could tray and reduce skimming for a wile to allow pelagic bacteria to stabilise in the water column. There is a possibility that you may be over filtering the tank too much, do you have any algae issues in the tank by the way?
 
OP
G

gabriel21946

Community Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 12, 2022
Messages
26
Reaction score
4
Review score
+0 /0 /-0
Location
new canaan
That’s a fairly large skimmer, I would personally go back to the elemi-NP and follow the instructions, you could tray and reduce skimming for a wile to allow pelagic bacteria to stabilise in the water column. There is a possibility that you may be over filtering the tank too much, do you have any algae issues in the tank by the way?
There is some algae but minor traces, no kind of out break. Do you really think I could be over filtering. I thought if I over filtered my nutrients would be close to zero, never the other way around where the fikteration is not allowing the bacteria to form. I can give this a try. The nyos 120 per the specs is for about my tank size. I thought it was under provisioned and may need a 160
 

sixty_reefer

2500 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Nov 8, 2018
Messages
4,751
Reaction score
6,746
Review score
+0 /0 /-0
Location
The Reef
There is some algae but minor traces, no kind of out break. Do you really think I could be over filtering. I thought if I over filtered my nutrients would be close to zero, never the other way around where the fikteration is not allowing the bacteria to form. I can give this a try. The nyos 120 per the specs is for about my tank size. I thought it was under provisioned and may need a 160
Don’t just take my word for it, you may find this article interesting


The experiment in this article has shown that reef aquariums that do heavy skimming will have 10 times less free floating bacteria than systems that don’t skim. By removing all this free floating bacteria that would of been competing with the algae for nutrients it allows for some invasive species to start to hold fast. Protein skimmers have they’re advantages although if too large they may work against you in regarding nutrients. In addition as you start to dose carbon most of that bacteria will be pelagic.
 
OP
G

gabriel21946

Community Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 12, 2022
Messages
26
Reaction score
4
Review score
+0 /0 /-0
Location
new canaan
Don’t just take my word for it, you may find this article interesting


The experiment in this article has shown that reef aquariums that do heavy skimming will have 10 times less free floating bacteria than systems that don’t skim. By removing all this free floating bacteria that would of been competing with the algae for nutrients it allows for some invasive species to start to hold fast. Protein skimmers have they’re advantages although if too large they may work against you in regarding nutrients. In addition as you start to dose carbon most of that bacteria will be pelagic.
I will definitely be reading this and give it a try. Thanks
 
Ultimate Corals
Top