Would it be dangerous? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 10-27-2012, 12:55 PM Thread Starter
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Would it be dangerous?

Would it be dangerous to use bag of houseplant food in planted tank with fish? It's called Osmocote Smart-Release Outdoor and Indoor plant food. Back of bag analysis says Nitrogen 19%, available Phosphate 6%, and soluble Potash 12%? Just wondering if it would be ok to use since I have lots of it leftover from houseplants.
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post #2 of 6 (permalink) Old 10-27-2012, 01:43 PM
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Potentially; why would you do this, anyway? Just get some real aquarium fertilizer. It's not like its expensive.

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post #3 of 6 (permalink) Old 10-27-2012, 02:28 PM
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That.
Plus dry fertilizer is even cheaper than premix and you can control exactly what goes in.
If you had to use this stuff you should probably find out a bit more about the actual ingredients. What form of nitrogen is it? How much zinc, molybdenum, manganese, and other micronutrients are there in it? Stuff like that can be helpful.

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post #4 of 6 (permalink) Old 10-27-2012, 05:23 PM
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I'm not sure about that specific product, but many of the terrestrial fertilizers use ammonia rather then nitrate as a nitrogen source--making it inadvisable to dump directly into the water column. Many people have used osmocote successfully buried in the substrate, though I have no direct experience with it. A forum search will probably turn up a bunch of useful discussion.
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post #5 of 6 (permalink) Old 10-27-2012, 06:11 PM Thread Starter
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Thanks for all the input. I have lots of this stuff sitting around because of all the houseplants we have so I thought I would just ask? Nitrogen is composed of Ammoniacal Nitrogen so it doesn't seem good to use as toastedtoast suggested. Thanks again all.
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post #6 of 6 (permalink) Old 10-27-2012, 08:53 PM
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I personally use Osmocote Plus 15-9-12 packed into empty -00- capsules, and bury into the substrate til it hits the bottom glass of my tank. I like the results I've been getting from using Osmocote Plus, and it only needs replaced every 4-5 months with a new capsule.

I put 1 Osmocote Plus capsule per square foot of tank space, and I've never had any issues with using it. All of plants, fish, shrimp, and snails are all doing fine.....

15g Fluval Flex - Will be a planted shrimp tank
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