How to make a Nitrate/Phosphate free fertilizer - The Planted Tank Forum
 2Likes
  • 2 Post By Surf
  • 2 Post By houseofcards
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 02-25-2018, 09:34 AM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2017
Posts: 5
Question How to make a Nitrate/Phosphate free fertilizer

Hello,
I have a goldfish tank with some anubias and java plants in it, As you may know goldfishes produce a lot of waste and ammonia which is converted to nitrates. so I am looking to make a custom fertilizer which lacks nitrates and phosphates (phosphates because I have a BBA bloom in my tank and I read somewhere that it is connected to phosphate levels) but has other required elements for my plants.
What common chemicals do you recommend to make such fertilizer ?
FiFtHeLeMeNt is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 02-25-2018, 10:20 AM
Planted Tank Enthusiast
 
tamsin's Avatar
 
PTrader: (0/0%)
Join Date: Jan 2011
Location: UK
Posts: 921
You might find it easier just to pick up a bottle of trace (micro) fertiliser e.g. Flourish which doesn't include them.

Otherwise find the recipe for Estimative Index and skip those. I owuldn't have thought you'll have the chemicals kicking around though, you'll need to order them.
tamsin is offline  
post #3 of 8 (permalink) Old 02-25-2018, 11:33 AM
Planted Tank Obsessed
 
Tiger15's Avatar
 
PTrader: (0/0%)
Join Date: Jan 2018
Posts: 322
What you need is API Leaf Zone that contains potassium and iron.

https://www.apifishcare.com/product....8#.WpKrF6jwbIV

But to combat BBA, you need to dose API carbon booster or Flourish Excel daily.

https://www.apifishcare.com/product....7#.WpKslqjwbIV
Tiger15 is offline  
 
post #4 of 8 (permalink) Old 02-25-2018, 12:51 PM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2017
Posts: 5
Quote:
Originally Posted by Tiger15 View Post
What you need is API Leaf Zone that contains potassium and iron.

https://www.apifishcare.com/product....8#.WpKrF6jwbIV

But to combat BBA, you need to dose API carbon booster or Flourish Excel daily.

https://www.apifishcare.com/product....7#.WpKslqjwbIV
Unfortunately I am not from US and dont have access to those commercial products, I need to make my own fertilizer from chemical compounds.
Anyone having any recipe for Nitrate/Phosphate free fertilizer ?
FiFtHeLeMeNt is offline  
post #5 of 8 (permalink) Old 02-25-2018, 02:53 PM
Wannabe Guru
 
Edward's Avatar
 
PTrader: (0/0%)
Join Date: Apr 2005
Location: at home
Posts: 1,358
Quote:
Originally Posted by FiFtHeLeMeNt View Post
Anyone having any recipe for Nitrate/Phosphate free fertilizer ?
Adding K2SO4 and MgSO4 with every water change would help,

per 10 gallon or 40L changed water
2 gm K2SO4, 22 ppm K
2 gm MgSO4, 5 ppm Mg


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Edward is offline  
post #6 of 8 (permalink) Old 02-25-2018, 05:50 PM
Banned
 
PTrader: (0/0%)
Join Date: Jun 2017
Posts: 1,300
For a macro fertilizer you need to add potassium, calcium magnesium sulfur. For micros you need chlorine, iron, Boron, Manganese, zinc, Copper, nickel, molybdenum.

You also need a fertilizer calculator. I use:
https://rotalabutterfly.com/nutrient-calculator.php

For the macros you can use calcium sulfate, magnesium sulfate and these will supply the needed sulfur. for calcium and magnesium you want about a 3 to 1 ratio (3 parts ca to 1 part Mg). Dose this during your once weekly water change and add enough to increase your GH to 2 degrees GH. For potassium you can use Potassium chloride which will also apply the need chlorine. Many other people use K2SO4 for potassium but you don't need the sulfur sine your Ca and Mg has it. For potassium you want 1 part potassium to 1 part nitrate. So if you have 10ppm nitrate I would add about 10ppm KCl. That should address all your macros.


Quote:
(phosphates because I have a BBA bloom in my tank and I read somewhere that it is connected to phosphate levels) but has other required elements for my plants.
High levels of phosphate, and nitrate, were once thought to cause algae but it has been shown many times that plant nutrient deficiencies cause most algae issues (not PO4, NO3, NH3) . I you have all the nutrients your plants need algae tends to grow slowly and plants will grow faster than the algae. Having sufficient macros might be all you need. You should use test kits to measure nitrogen and phosphate levels. Ideally you want nitrate levels between 5ppm and 20ppm with phosphate levels at about 1ppm. if you need to add these use potassium nitrate KNO3, and Potassium mono phosphate KH2PO4.

If just dosing macros doesn't solve the problem you will need micro fertilizer. Most people buy these but if you need to make your own you may want to look at this thread:
https://www.plantedtank.net/forums/11...ix-thread.html

All of the ingredients can be hound on line ate Amazon.com, Loudwolf.com, Ebay and other sites. On wikipedia.org you can find information on each chemical used in fertilizers and general information on plant nutrition:http://https://en.wikipedia.org/wiki/Plant_nutrition
FiFtHeLeMeNt and FiFtHeLeMeNt like this.
Surf is offline  
post #7 of 8 (permalink) Old 02-26-2018, 12:03 AM
Banned
 
PTrader: (73/100%)
Join Date: Mar 2009
Location: New York
Posts: 5,942
Quote:
Originally Posted by FiFtHeLeMeNt View Post
...As you may know goldfishes produce a lot of waste and ammonia ..
To better address your problem you don't need a custom fertilizer. You have the answer to your problem in your quote above.

If you rely on waste/food for your macros it means your tank is high on organics. As these organics breakdown they are the prime reason you have BBA. These organics settle into most surfaces and as they breakdown provide a food source for BBA, including the surfaces of slow growing plants like anubias and ferns. What you want to do is change more water, use carbon or other organic removal products to get the organic levels down and provide any NPK by dosing.
FiFtHeLeMeNt and FiFtHeLeMeNt like this.
houseofcards is offline  
post #8 of 8 (permalink) Old 02-26-2018, 09:14 AM Thread Starter
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2017
Posts: 5
Thank you everyone for your responses
FiFtHeLeMeNt 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