Coffee grounds for pH?? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 20 Old 11-14-2011, 11:57 PM
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Well looking forward if you do decide to go forward with it to hear your results, read that paper and yea they used enormous amounts of caffeine in their experiments. Basicly their paper said if you give this bacteria food (caffeine), it will multiple and produce waste (ammonia) no big scientific jump there but my guess is the biological fiter in your tank would be able to keep up with the ammonia being produced with out much of a problem as long as you didn't start dosing your tank with pure caffeine
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post #12 of 20 Old 11-15-2011, 12:02 AM Thread Starter
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I also didn't see anything in that report stating that they had a fully cycled aquarium and that too could have affected the ammonia levels. I'm thinking if no one has any evidence stating that coffee has any toxic effects towards fish then i'll start VERY slow and just keep an eye on things to see how it goes. Wish me luck :D
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post #13 of 20 Old 11-15-2011, 01:22 AM
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Caffeine is not the only chemical in coffee. There are over a thousand chemicals in roasted coffee. Have you accounted for all of these, and their effects on fish? Have you considered insecticide residue? Some of the chemicals have even been found to be carcinogenic in rats. Please don't make your fish into test subjects just for the sake of recycling some grounds!
In addition, its much better for the environment to care for your fish in the first place. Think of all the resources used to breed fish, raise fish, transport them to the store, and then care for them until they are purchased. Its much more green to keep them healthy!
There are many fabulous ways to recycle grounds. They make great fertilizer as is, or you can soak them in water for liquid fertilizer (for terrestrial plants). Phosphorus is gold, you shouldn't waste it. Grounds also keep ants away and take oders from your hands. These are just a few uses, a quick google search will turn up more!

"My dither fish need dither fish!"

Last edited by MinaMinaMina; 11-15-2011 at 01:26 AM.
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post #14 of 20 Old 11-15-2011, 03:12 AM Thread Starter
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I actually use non roasted organic coffee from one of my local shops and I do recycle my leftover coffee as is and compost. But I have more than enough to go around. I'm not asking your personal opinon on the subject i'm asking if anyone has any information pertaining to the tocicity of coffee to fish.
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post #15 of 20 Old 11-15-2011, 07:11 AM
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Originally Posted by MinaMinaMina View Post
There are over a thousand chemicals in roasted coffee.

A thousand?

Can you list them for us, or are they on the label under "Ingredients?

That's gotta be more than a Twinkie has!

Maybe Dow and DuPont should start marketing coffee.

Sorry, I couldn't resist
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post #16 of 20 Old 11-15-2011, 09:01 AM
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I don't believe you're going to find any complete information on that. That is my conclusion based on fact. It is fact that there are over 1,000 chemicals in coffee. It is fact that very few chemicals in coffee have been tested at all, much less on fish. It is fact that, of the 26 that have been tested, 19 are rodent carcinogens. Yes, rodents aren't people and rodents aren't fish. But obviously there are many variables here. Even if you find evidence that caffeiene is not harmful to fish, there are many more chemicals that are unknown. Why would you do this to fish?

I honestly don't mean to offend you. It is also not my goal to appease you. It is my goal to look out for animals.

"My dither fish need dither fish!"
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post #17 of 20 Old 11-15-2011, 09:09 AM
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Hey, TwilightGuy, ya made me smile! But chemicals can refer to natural compounds, like how there is a cyanide compound in apple seeds. But synthetic chemicals, those are a beast of a different color! A person I used to know went organic and vegan while she was getting her doctorate in chemistry over all the ugly little things she came to understand about synthetic ingredients in food. Yikes! Sometimes I think ignorance is bliss while I'm enjoying my Little Debbie apple pie.

"My dither fish need dither fish!"
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post #18 of 20 Old 11-15-2011, 12:00 PM
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I've tried it, and it resulted in a bacterial bloom.

(Well, it wasn't organic, and wasn't decaf... but I won't be trying it again.)

The benefit of peat is that it's preserved and won't break down readily... Coffee on the other hand will break down, and probably result in an ammonia spike too.

I'd use the coffee for compost, and oak leaves to add tannins. (I love oak leaves)

Originally Posted by Christople View Post
^^ genius

Soil Substrates Guide:
Part 1
--------- Part 2

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post #19 of 20 Old 11-15-2011, 02:06 PM Thread Starter
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Ah well thank you. I've never tried oak leaves but do they lower pH as well as adding tannins?
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post #20 of 20 Old 11-15-2011, 11:14 PM
You would need a lot of oak leaves to have much of any impact on pH and that will depend a lot on how much buffering capacity your water has. Dead oak leaves do not allow much water movement through them so I'm not sure how well they are going to work in a filter.

What it comes down to is you can get a HUGE amount of peat for very cheap. Home depot sells 3 cubic feet of compressed peat for less then $10. I've bought those bales on more then one occasion and they weigh like 50 pounds. I can't see how any alternative is going to be worth the difficulties and risks.

.... I'm probably drunk.

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caffine , coffee , ph change

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