Fertilizer as substrate... - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 02-18-2013, 09:08 AM Thread Starter
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Fertilizer as substrate...

So I bought a bag of this stuff at costco because I was curious:





It has a neat texture, so I'm going to try and grow some stuff emersed in it directly...

Is this a terrible idea?

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post #2 of 5 (permalink) Old 02-18-2013, 03:07 PM
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Yes, it is a terrible idea! Fertilizer and substrate are not synonyms. That stuff would be far too "rich" for use as a substrate. It might work as a thin layer under an inert substrate, like pool filter sand, or Flourite. But, as it a substrate it would be a disaster.

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post #3 of 5 (permalink) Old 02-18-2013, 09:54 PM Thread Starter
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Fertilizer as substrate...

Quote:
Originally Posted by Hoppy View Post
Yes, it is a terrible idea! Fertilizer and substrate are not synonyms. That stuff would be far too "rich" for use as a substrate. It might work as a thin layer under an inert substrate, like pool filter sand, or Flourite. But, as it a substrate it would be a disaster.
Haha ok!

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post #4 of 5 (permalink) Old 04-29-2013, 06:48 AM Thread Starter
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So... I ended up setting this up as an emersed experiment anyway back in February, things have actually been doing pretty well. One of my crypts came back from the dead.


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post #5 of 5 (permalink) Old 04-30-2013, 04:17 AM
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Given the low level of nutrients and the high organic matter content I can see how it would work for a dry start, or even a filled tank with no livestock. Might or might not encourage algae.

I would not want those fertilizer levels in a tank with fish, though.

I like the idea of using it as a completely buried thin layer under a substrate with a high CEC. Trap some of the nutrients before they escape into the water.
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