Nitrates to phosphates ratio - The Planted Tank Forum
 2Likes
  • 4 Post By burr740
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 10-03-2015, 09:05 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Aug 2015
Location: New York City
Posts: 34
Nitrates to phosphates ratio

My phosphates just measured at zero, which would never be able to stay within the 10-1 recommended ratio. I'm dosing 1ml every other day in a 10 gallon tank and I can't get above zero phosphates. Is this something to worry about? Is zero phosphates a good thing in an aquarium?
Brook16 is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 10-03-2015, 09:11 PM
Children Boogie
 
mistergreen's Avatar
 
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
If you have plants, you'd need phosphates.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
mistergreen is offline  
post #3 of 13 (permalink) Old 10-03-2015, 09:16 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Aug 2015
Location: New York City
Posts: 34
So should I dose phosphates every day?
Brook16 is offline  
 
post #4 of 13 (permalink) Old 10-03-2015, 10:50 PM
Plant Whisperer
 
Zapins's Avatar
 
PTrader: (28/100%)
Join Date: Jan 2006
Location: Harrogate, TN
Posts: 2,537
What product are you using?

The liquid fertilizers they sell in bottles from the store are extremely dilute and it takes massive overdosing to reach proper levels. You'd probably need at least 5-10 x the recommended dosing to raise the PO4 levels in the tank to measurable levels. This is why most people who use EI use powdered dry potassium phosphate instead of premixed liquid ferts.

Zapins
Zapins is offline  
post #5 of 13 (permalink) Old 10-03-2015, 11:24 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Aug 2015
Location: New York City
Posts: 34
I'm using Seachem Phosphorus.

Bump:
Quote:
Originally Posted by Brook16 View Post
I'm using Seachem Phosphorus.


If I used potassium phosphate, how much would be needed in a 10 gallon?
Brook16 is offline  
post #6 of 13 (permalink) Old 10-03-2015, 11:44 PM
Planted Tank Obsessed
 
quiquik's Avatar
 
PTrader: (1/100%)
Join Date: Dec 2013
Location: Crown Point,In.
Posts: 384
If I remember correctly say your nitrate is at 20 ppm you would shoot for .2 ppm for phosphate
quiquik is offline  
post #7 of 13 (permalink) Old 10-04-2015, 12:45 AM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Aug 2015
Location: New York City
Posts: 34
Quote:
Originally Posted by quiquik View Post
If I remember correctly say your nitrate is at 20 ppm you would shoot for .2 ppm for phosphate
Do you mean .2 or 2ppm?
Brook16 is offline  
post #8 of 13 (permalink) Old 10-04-2015, 12:56 AM
Planted Tanker
 
burr740's Avatar
 
PTrader: (123/100%)
Join Date: Feb 2014
Location: Bama
Posts: 5,463
There is no magic ratio, just need to provide enough of all things. Depending on the demands of your tank, anywhere from 1 to 5+ can be fine. The so-called ratios you see listed are more of a guideline than anything.
Zapins, Zapins, Xiaozhuang and 1 others like this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




burr740 is online now  
post #9 of 13 (permalink) Old 10-04-2015, 04:20 AM
Plant Whisperer
 
Zapins's Avatar
 
PTrader: (28/100%)
Join Date: Jan 2006
Location: Harrogate, TN
Posts: 2,537
Yep, burr has the right of it. There is no magic number, and ratios really don't work in the real world. Plants take up what they need and those ratios change by the hour, minute, second. Leave it up to the plant to decide what it needs, just be sure that none of the nutrients runs out and you'll be fine. Also, don't overdo it. 2ppm PO4 per week is likely more than enough for all growth needs in a heavily planted tank.

This is the site you want to use to calculate dosages. It makes everything easy.
Yet Another Nutrient Calculator

Quote:
Originally Posted by website
To reach your target of 2.0 ppm PO4 you will need to add 108 mg KH2PO4 to your 10.0 US gal aquarium to yield
Element ppm/degree
K 0.82
P 0.65
PO4 1.99

Zapins
Zapins is offline  
post #10 of 13 (permalink) Old 10-04-2015, 11:49 AM
Planted Tank Obsessed
 
quiquik's Avatar
 
PTrader: (1/100%)
Join Date: Dec 2013
Location: Crown Point,In.
Posts: 384
Quote:
Originally Posted by Zapins View Post
Yep, burr has the right of it. There is no magic number, and ratios really don't work in the real world. Plants take up what they need and those ratios change by the hour, minute, second. Leave it up to the plant to decide what it needs, just be sure that none of the nutrients runs out and you'll be fine. Also, don't overdo it. 2ppm PO4 per week is likely more than enough for all growth needs in a heavily planted tank.

This is the site you want to use to calculate dosages. It makes everything easy.
Yet Another Nutrient Calculator
I agree with Burr and Zapins every tank has its own so called personality.
quiquik is offline  
post #11 of 13 (permalink) Old 10-04-2015, 12:13 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Aug 2015
Location: New York City
Posts: 34
Thanks to all. I'll get some potassium phosphate going forward. A search online showed something like 1/32 of a tsp 3x a week would do the trick. But to use up the bottle of Seachem I just got t seems like instead of 1ml it would probably be in the order of 5ml + to do the same thing.
Brook16 is offline  
post #12 of 13 (permalink) Old 10-05-2015, 01:24 PM
Planted Tank Guru
 
klibs's Avatar
 
PTrader: (29/100%)
Join Date: May 2014
Location: NH
Posts: 3,325
Quote:
Originally Posted by burr740 View Post
There is no magic ratio, just need to provide enough of all things. Depending on the demands of your tank, anywhere from 1 to 5+ can be fine. The so-called ratios you see listed are more of a guideline than anything.
+1

Every tank is different. There are no magic numbers that can act as 'perfect values' and work for all tanks.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
klibs is offline  
post #13 of 13 (permalink) Old 10-05-2015, 05:25 PM
Planted Tank Guru
 
PTrader: (538/100%)
Join Date: Jul 2010
Location: Oregon
Posts: 3,008
Quote:
Originally Posted by Brook16 View Post
Thanks to all. I'll get some potassium phosphate going forward. A search online showed something like 1/32 of a tsp 3x a week would do the trick. But to use up the bottle of Seachem I just got t seems like instead of 1ml it would probably be in the order of 5ml + to do the same thing.
It will take 18ml of the seachem phosphorus to add 2ppm po4 to a 10g tank.
nilocg is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome