Greensand - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 01-26-2010, 03:30 PM Thread Starter
Planted Tank Guru
PTrader: (153/100%)
Join Date: Mar 2009
Location: Madison, Wisconsin
Posts: 9,750

Hi Everybody, I have been doing a bit of research on slow-release nutrient sources and I wonder about the use of greensand as an amendment to a MTS-type substrate.

With a Google search I found just a handful of references to the use of greensand in planted tanks. Several of these warned that if immersed in water greensand will dump all of its nutrients quickly and cause trouble.

I also searched for descriptions of use in water gardening/ponds and found nothing. I wonder if greensand might be unsuitable for this kind of application(?). Does anybody have any opinions about this?
hydrophyte is offline  
Sponsored Links
post #2 of 3 (permalink) Old 01-26-2010, 05:54 PM
Planted Tank Guru
PTrader: (16/100%)
Join Date: Jul 2008
Location: East Lansing, MI, USA
Posts: 2,709
Asking us if we have opinions on anything is opening the door to ...

You ask an interesting question. The glauconite in greensand should release iron as well as the potash. Greensand is supposed to not be soluble in water so I don't understand how the nutrients would dump.

Grad Student alert. Possible thesis project for aquatic, hydroponic, and pond amendment use.
post #3 of 3 (permalink) Old 01-26-2010, 06:27 PM Thread Starter
Planted Tank Guru
PTrader: (153/100%)
Join Date: Mar 2009
Location: Madison, Wisconsin
Posts: 9,750
I am prepared to sift through as many opinions, informed and otherwise, as I can get.

Well it seems like a good thing to use. I have encountered few other slow-release sources for K. Do you have any other ideas for rock-based or organic options for potassium?

If you search here on TPT there is apparently just one member who reports using it as amendment with his soil substrate. It looks as though he has had good results, although you have to guess that the soil itself provided a robust reserve of nutrients.
hydrophyte is offline  

fertilizer, greensand, slow release

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

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