messy mulm all bad- natural ferts? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 01-13-2008, 02:37 AM Thread Starter
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messy mulm all bad- natural ferts?

Why is it so bad to have mulm on the tank bottom? Doesn't it produce natural ferts? People have said detritus contributes to algae. I don't see how, unless it produces excess nutrients, and you would know that with test kits.
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post #2 of 11 (permalink) Old 01-13-2008, 03:21 AM
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it's fine for plants, but can be deadly for fish.
excess mulm can overwhelm a fishes immune
system causing all kinds of common diseases
such as fin & tail rot. the best amount of mulm
is when you don't see it above the substrate.


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post #3 of 11 (permalink) Old 01-13-2008, 03:36 AM Thread Starter
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it's fine for plants, but can be deadly for fish.
excess mulm can overwhelm a fishes immune
system causing all kinds of common diseases
such as fin & tail rot. the best amount of mulm
is when you don't see it above the substrate.
Thanks. Is this the same thing as DOC? What is it that's bad compared to added ferts?
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post #4 of 11 (permalink) Old 01-13-2008, 03:54 AM
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ferts are raw dead minerals that supplement what is available naturally.

mulm consists of microorganisms, bacteria, plant debris, fish fecal matter.
all of which HELP your biological filtration when contained by your substrate
in moderate quantities, and provide nitrogen and phosphates for your plants.


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post #5 of 11 (permalink) Old 01-13-2008, 03:59 AM Thread Starter
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Ok. Thanks. I usually get most of it w/ the filter and weekly water change.
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post #6 of 11 (permalink) Old 01-13-2008, 04:02 AM
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if you have excess mulm problems, you might want to reevaluate
your substrate depth, fish load and amounts of food you provide.
these issues contribute the most to excess mulm accumulation.
a good planted tank keeper rarely needs to vacuum out mulm.


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post #7 of 11 (permalink) Old 01-13-2008, 04:19 AM Thread Starter
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Originally Posted by spypet View Post
if you have excess mulm problems, you might want to reevaluate
your substrate depth, fish load and amounts of food you provide.
these issues contribute the most to excess mulm accumulation.
a good planted tank keeper rarely needs to vacuum out mulm.
Most of it is dead plant debris. I hope that as my plants do better, this will be reduced. My fish tend to break off leaves too (big fish swimming through), which contributes to the amount of leaves on the substrate.
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post #8 of 11 (permalink) Old 01-13-2008, 04:26 AM
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My shrimps love the mulm. I use a turkey baster to blow the substrate (sand), which makes the mulm rest to the top. Then I watch all the shrimp feast on it.
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post #9 of 11 (permalink) Old 01-13-2008, 04:31 AM Thread Starter
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My shrimps love the mulm. I use a turkey baster to blow the substrate (sand), which makes the mulm rest to the top. Then I watch all the shrimp feast on it.
Weird - and cool. My ghost shrimp will eat anything.
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post #10 of 11 (permalink) Old 01-13-2008, 04:35 AM
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Weird - and cool. My ghost shrimp will eat anything.

I hate to suggest animals to handle specific tasks, but ghost shrimp do keep things clean. I know they suck up any extra food (amonst other things) that hit the bottom of the tank.

I actually had a cardnial tetra die in the tank about 3 months ago. I saw it listing at the surface one night and knew I would be getting it out in the morning. The next day, the only thing left of the fish was a perfectly intact skelleton. It was amazing! The ghost shrimp picked it clean sometime during the night.

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- XP2, Dual Aquaticlife link Fixture , Pressurized CO2, DIY Reactor, EI dosing


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post #11 of 11 (permalink) Old 01-13-2008, 04:42 AM Thread Starter
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The next day, the only thing left of the fish was a perfectly intact skelleton. It was amazing! The ghost shrimp picked it clean sometime during the night.
Eeeewwww - creepy little buzzards
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