Osmocote Plus concern? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 05-19-2011, 05:04 AM Thread Starter
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Osmocote Plus concern?

At the bottom of the bottle, it has this warning:

Quote:
WARNING: This fertilizer contains molybdenum (Mo). The application of this fertilizer materials containing molybdenum (Mo) may result in forage crops containing levels of molybdenum (Mo) which are toxic to ruminant animals.
I know fish, snails, shrimp, and crayfish aren't ruminants but if one eats a leaf, is the molybdenum a concern?
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post #2 of 11 (permalink) Old 05-19-2011, 05:58 AM
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Well if they don't eat all the plants, they should be OK. Cows eat tons of vegetation and Mo might build up as a heavy metal. People use Osmocote on their veggie gardens and fruit trees. There isn't a warning against that that I've seen.

/me checks my Osmotote Plus label again: Nope.

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post #3 of 11 (permalink) Old 05-19-2011, 06:42 AM Thread Starter
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How about Mo in the water column? 0.0005%
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post #4 of 11 (permalink) Old 05-19-2011, 08:11 AM
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Regular water changes should take care of that.

Steve


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post #5 of 11 (permalink) Old 05-19-2011, 01:32 PM Thread Starter
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No, I mean if it's in another fertilizer that I'm dosing into the water column. Not what escapes from the root feeding.
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post #6 of 11 (permalink) Old 05-19-2011, 04:02 PM
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Regular water changes should take care of both.

Steve


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post #7 of 11 (permalink) Old 05-22-2011, 09:22 PM
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Ruminants eat huge amounts of vegetation (actually, it's all they eat) and heavy metals build up in their tissues. Unless you are growing your plants as a sole food source for your fish, I wouldn't worry about it. Zinc and copper are very toxic also, and almost every aquatic plant grower adds them to their water.

If it turns out that adding molybdenum to your substrate kills snails, make sure to post your results, as there are endless posts by people wanting to get rid of their poor, little pond snails.
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post #8 of 11 (permalink) Old 05-22-2011, 09:37 PM
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I hate little plant eating pond & rams horn snails.

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post #9 of 11 (permalink) Old 05-22-2011, 09:40 PM
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You will not have a problem in our application at these levels.
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post #10 of 11 (permalink) Old 05-23-2011, 03:57 AM Thread Starter
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That's good to know. And I must be one of the few people happy to see these snails because I'm trying to keep them alive in my acidic, low KH and low GH water so I can feed them to my puffers.
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post #11 of 11 (permalink) Old 05-25-2011, 01:52 AM
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I don't mind them either. They don't eat plants, just left over food and algae, which I'm OK with. Supply them too much food and they can propogate to nuisance levels though.

There are a few "colored" versions of the ramshorns that people have cultured if you're really into snails.

I myself don't like them enough to go buying them on purpose, but I hold no ill will towards them either.
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