figuring out how much sulfate fertilizer to add?? - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 02-12-2004, 08:09 PM Thread Starter
Planted Member
PTrader: (2/100%)
Join Date: Oct 2003
Location: Sac, CA
Posts: 176
fertilizers i have are(dry form):

KNO3 (potassium nitrate)
K2SO4 (potassium sulfate)
KH2PO4 (mono-potassium phosphate)
Mn (Manganese Sulfate)

I figured out by nitrate and phosphate test kits for the KNO3 and KH2PO4

but what do i need to determine the amount of the sulfates i need to add?

I only have a 20 gal tank, the calculator hardly works for my tanks since it only starts at grams, i land up just making the calculator 60 gal and dividing all the measurements by 3.
infin is offline  
Sponsored Links
post #2 of 6 (permalink) Old 02-12-2004, 08:16 PM Thread Starter
Planted Member
PTrader: (2/100%)
Join Date: Oct 2003
Location: Sac, CA
Posts: 176
or how much of eash should i be adding, when i tested my tank, my nitrtates were 0ppm, phosphate 0.1 ppm ph 6.9 kh 13

#19 E-pimp
infin is offline  
post #3 of 6 (permalink) Old 02-12-2004, 09:38 PM
PTrader: (0/0%)
Join Date: Nov 2003
Posts: 2,165
Ok, you're not dosing're using those to get potassium (form K2SO4) and Magnesium.

You need to add nitrates for sure. phosphates are low too. there are no test kits out there for potassium or magnesium. No clue on dosing Mn, but potassium should be dosed after a water change to about 20ppm.
Use this calculator
It goes down to 20 gallons, but I prefer to download his calculator because it has dry dosing options...not just how to mix stock solutions
malkore is offline  
post #4 of 6 (permalink) Old 02-13-2004, 12:56 AM
PTrader: (0/0%)
Join Date: Sep 2003
Posts: 153
Lamotte has a potassium test kit. I use it once in a while. It works pretty good. It is tough to read but it does give you the ballpark.

ken6217 is offline  
post #5 of 6 (permalink) Old 02-13-2004, 12:59 AM
Planted Tank Guru
Rex Grigg's Avatar
PTrader: (65/100%)
Join Date: Dec 2002
Location: Portland Orygun
Posts: 9,600
He said he had Manganese not Magnesium. But I would guess he really has Magnesium.
Rex Grigg is offline  
post #6 of 6 (permalink) Old 02-13-2004, 09:13 PM
PTrader: (0/0%)
Join Date: Nov 2003
Posts: 2,165
Yeah, I figured LaMotte had one, but I'm not interested in a $60 test kit.

And Rex...yep I know he put manganese, but I too assumed he meant magnesium (just because I'm used to using Chuck's calculator)
malkore is offline  


Quick Reply

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


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

Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Jobes House Plant Fertilizer sticks for substrate? Jeffd17 General Planted Tank Discussion 4 05-23-2006 01:08 AM
Substrate and fertilizer cramramdon Equipment 8 08-23-2004 06:04 PM
Copper in my plant fertilizer! Help please! zacasonapan General Planted Tank Discussion 8 06-17-2004 12:52 PM
dosing plantex & magnesium sulfate mr hyde Fertilizers and Water Parameters 2 06-12-2004 03:37 PM
newbie trying to understand the fertilizer AoPfan General Planted Tank Discussion 2 04-05-2003 12:41 AM

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