Riparium Planter Fertilizing - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 10-07-2009, 05:15 AM Thread Starter
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
Riparium Planter Fertilizing

Riparium plants are planted in individual little "pots" which hang partly in the tank water, and like all plants, they need feeding. One way to feed them, like for submersed plants, is to fertilize the water in the tank. Based on what I see, this is not optimum fertilizing. Another way is to fertilize the planter mix in each planter.

I'm wondering if Osmocote would be a good fertilizer for this use. Osmocote is pellets of fertilizer coated with a material that only allows a small amount of the nutrient to escape in any given time - a time release fertilizer. Of course, being a terrestrial plant fertilizer, Osmocote contains a lot of ammonia/urea as part of its nitrogen component. And, ammonia and urea are not recommended for aquariums.

Does anyone have any thoughts about how Osmocoat would work as the fertilizer for Riparium planters? I'm asking because Tom Barr has suggested that Osmocoat under an aquarium substrate would be a good way to get a nutrient laden substrate, partly because the nutrients can't dump into the water, but are only slowly released, thus won't do any harm. This suggests to me that it would be ideal for riparium planters.

Hoppy
Hoppy is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 10-07-2009, 07:54 PM Thread Starter
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
No opinions? Today I found Osmocote at Home Depot, and got a lifetime supply - 3 pounds - for $10. I have now poked 2 little balls into a few of my riparium planters to see what happens. The Osmocote I found, the only one sold there in less than 5 lifetimes supply, doesn't have trace elements in it, just NPK, so I'm not sure this is a valid test.

Hoppy
Hoppy is offline  
post #3 of 5 (permalink) Old 10-07-2009, 08:26 PM
Planted Tank Guru
 
PTrader: (153/100%)
Join Date: Mar 2009
Location: Madison, Wisconsin
Posts: 9,750
I understood that Osmocote works by osmosis, hence the brand name. I think that it is not advisable to use it in very wet situations because it is apt to dump all of the fertilizer in a short period of time. I have heard of problems with this effect and nursery stock subjected to wet conditions. Osmocote should work best in media with moderate amounts of moisture.
hydrophyte is offline  
 
post #4 of 5 (permalink) Old 10-07-2009, 09:52 PM Thread Starter
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
Quote:
Originally Posted by hydrophyte View Post
I understood that Osmocote works by osmosis, hence the brand name. I think that it is not advisable to use it in very wet situations because it is apt to dump all of the fertilizer in a short period of time. I have heard of problems with this effect and nursery stock subjected to wet conditions. Osmocote should work best in media with moderate amounts of moisture.
I read a lot of the information on the Osmocote website and it appeared from that that very moist conditions would not cause a dump of nutrients. Of course, this is not the situation that Osmocote was developed for, so they don't come right out and say it will work for marsh conditions. In any case it is now only in some planters in my 15H tank, those that don't seem to be doing anything now, so at worst it doesn't work well, and I get green water in the tank. My question will then be answered, even though I won't like the answer.

Extrapolating the bottle recommended dosage of one teaspoon for a 8 inch pot, I figured the small riparium planters would need from 1/32nd to 1/16th tsp, and that looked like around two little balls. I didn't get out my micrometer to measure the balls, though

Hoppy
Hoppy is offline  
post #5 of 5 (permalink) Old 10-07-2009, 10:29 PM
Planted Tank Guru
 
PTrader: (153/100%)
Join Date: Mar 2009
Location: Madison, Wisconsin
Posts: 9,750
With such small quantities as those even if it did release quickly I imagine that it wouldn't have a real bad effect. And the substrate in the planter and the plant roots would also impede escape of the nutrients out into the aquarium water.
hydrophyte 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