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How often do I replace Osmocote?

3002 Views 3 Replies 3 Participants Last post by  natemcnutty, 
Iwagumist
The title pretty much says it all; how often should I replace Osmocote Plus root tabs for my planted tanks? I remember it being about every 4 to 6 months, but I can't remember so I am not sure. I am also not sure if I should follow the replacement instructions on the back of the package since it was written for potted and other terrestrial plants. If it is about ever 4-6 months than I definitely need to do it; it has been way longer than that.
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burr740
I dont think anyone can give you a specific answer exactly how long they last. You'll get opinions based on personal experience, anywhere from 2-3 months to 6 months plus. The type of substrate probably plays a role too, high cec vs low, etc

Ive used them a lot in several different tanks, all with inert sand substrate. My personal opinion is they're good for at least 6 months. ymmv

Do the plants still look good, growing well? If yes then dont worry about it. If not then it may be time
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Iwagumist
burr740 said:
I dont think anyone can give you a specific answer exactly how long they last. You'll get opinions based on personal experience, anywhere from 2-3 months to 6 months plus. The type of substrate probably plays a role too, high cec vs low, etc

Ive used them a lot in several different tanks, all with inert sand substrate. My personal opinion is they're good for at least 6 months. ymmv

Do the plants still look good, growing well? If yes then dont worry about it. If not then it may be time
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The plants do seem to have slowed down a bit, that is why I am wondering.
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natemcnutty
Last time I pulled a plant at work, a few O+ balls came with it. As a test, I crushed it, and there was still plenty in it. That was after 7 months in black diamond blasting sand about 2 inches below the surface of the substrate.

The type of substrate plays a huge role. The more it breathes, the faster it leaches out. Gravel will not last as long. Also, number of plants feeding off it probably make a difference too.

Sent from my Nexus 6 using Tapatalk
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