Coffee anyone? - The Planted Tank Forum
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post #1 of 25 (permalink) Old 01-23-2008, 04:02 PM Thread Starter
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Coffee anyone?

Here is another question for you guys and gals, what about using coffee grounds?

Many Starbucks will give their used grounds for people to use in their gardens, after doing a little research, the used grounds are great for plants liking acidic soil.

Hence, if coffee grounds lower the ph and also contain minerals that would help the plants, does anyone think this is plausible?

I'm going to test it out with some bog plants first, and then use a control with some other plants to see if it has any adverse affects on the water chemistry other than ph...if it doesn't seem to be to bad I'll test it with some of my common guppies to see how they take to it....

I figure it will have no more affect than peat in an aquarium, so what do you all think?

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post #2 of 25 (permalink) Old 01-23-2008, 04:06 PM
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Good stuff, keep us posted on this coffee grounds experiment..Wild!
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post #3 of 25 (permalink) Old 01-23-2008, 04:07 PM
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It might make your water murky...Like coffee....Interesting idea though.

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post #4 of 25 (permalink) Old 01-23-2008, 04:08 PM
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Let us know how it taste?
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post #5 of 25 (permalink) Old 01-23-2008, 04:17 PM
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I'm guessing it'll work very similarly to peat, but it'd be cool to see. And it'd smell good.

I saw an experiment at a science fair once where plants reacted to mind-altering chemicals by growing super fast and dying off. I can't remember if the experiment used alcohol or caffeine to get this behavior though, but if it was caffeine, then it'd be very cool to see how it does with aquarium plants!


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post #6 of 25 (permalink) Old 01-23-2008, 04:18 PM
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Why do I envision fish bouncing off the glass?...lol
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post #7 of 25 (permalink) Old 01-23-2008, 04:19 PM
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I wonder if you will use organic fair trade coffee? HMM
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post #8 of 25 (permalink) Old 01-23-2008, 05:01 PM
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Why do I envision fish bouncing off the glass?...lol
Just give 'em decaf!
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post #9 of 25 (permalink) Old 01-23-2008, 05:08 PM
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yea i was going to say, caffeine is toxic to humans in smaller amounts than you might think... i dunno if it's toxic to fish, but i would assume so. I would say, make sure it's decaf...
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post #10 of 25 (permalink) Old 01-23-2008, 11:50 PM
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That'd make the house smell GREAT!!!!


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post #11 of 25 (permalink) Old 01-24-2008, 12:35 AM
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your ph is going to be like 5....
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post #12 of 25 (permalink) Old 01-24-2008, 09:05 AM
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my only worry is thinking back to the days of going into work to see a coffee pot that had been sitting since friday.....thankfully the grounds weren't much of the smell.

should be interesting either way, can't say that even remotely thought about trying anything like that though lol.

Good luck

Jason
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post #13 of 25 (permalink) Old 01-25-2008, 04:40 PM
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Talking

I have grown oyster mushrooms in coffee grounds and that worked well. I would try this in a bucket first as coffee grounds seem to float pretty well initially. You might want to try it in a tank without fish you are terribly fond of as caffeine is quite obviously a cns stimulant and may have adverse effects on the fish. The fish may also get coffee breath, tend to smoke cigarettes more often and experience headaches when the coffee is withdrawn. A fish may consider this a small price to pay in order to be a coffee achiever.
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post #14 of 25 (permalink) Old 01-25-2008, 05:07 PM
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. The fish may also get coffee breath, tend to smoke cigarettes more often and experience headaches when the coffee is withdrawn. A fish may consider this a small price to pay in order to be a coffee achiever.
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post #15 of 25 (permalink) Old 01-25-2008, 05:08 PM
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JUST USE FLORABASE!!

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