Ask a Question forum: copper pennies

Views: 392, Replies: 6 » Jump to the end
Name: anglfsh
East Texas
Mar 22, 2015 6:30 PM CST
Will copper pennies harm the fish in a small fountain or aquarium? I think the fountain is 8 gallons.
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level
Beekeeper Garden Sages Avid Green Pages Reviewer Celebrating Gardening: 2015 Plant Identifier Million Pollinator Garden Challenge
Mar 22, 2015 7:13 PM CST Admin

Copper will not harm fish.
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member Celebrating Gardening: 2015 I was one of the first 300 contributors to the plant database! I helped beta test the first seed swap Garden Sages Million Pollinator Garden Challenge
Region: United States of America Region: Michigan Seed Starter Vegetable Grower Greenhouse Birds
Mar 22, 2015 7:26 PM CST
and I don't think there's all that much copper in "copper pennies" anymore -- is there?


"In 1962, the cent's tin content, which was quite small, was removed. That made the metal composition of the cent 95 percent copper and 5 percent zinc.

The alloy remained 95 percent copper and 5 percent zinc until 1982, when the composition was changed to 97.5 percent zinc and 2.5 percent copper (copper-plated zinc). Cents of both compositions appeared in that year."

Apparently we need to change our thinking to "zinc pennies"
"Blessed is he who has learned to laugh at himself, for he shall never cease to be entertained."
- John Powell / - A Universe of Communities
/ Share your recipes: Favorite Recipes A-Z cubit
C/F temp conversion / NGA Member Map
[Last edited by Weedwhacker - Mar 22, 2015 7:29 PM (+)]
Give a thumbs up | Quote | Post #814460 (3)
Name: Bob
Vernon N.J. (Zone 6a)
Charter ATP Member Plant Database Moderator I was one of the first 300 contributors to the plant database! Forum moderator Heucheras Echinacea
Hellebores The WITWIT Badge Dog Lover Lover of wildlife (Black bear badge) Region: New Jersey Celebrating Gardening: 2015
Mar 22, 2015 8:51 PM CST
I have read in fish tank forums that they are used to kill snails and inverts. They can also kill scaleless fish.
Name: Jeanne
Lansing, Iowa (Zone 5a)
Mar 22, 2015 9:32 PM CST
I have read the the true older copper pennies are good to use in bird baths and fountains to help control algae. Has anyone else heard this?
Yard decor, repurposing, and flowers,
Name: Elaine
Sarasota, Fl
The one constant in life is change
Cat Lover Master Gardener: Florida Tropicals Multi-Region Gardener Vegetable Grower Region: Florida
Herbs Orchids Birds Garden Ideas: Level 2 Garden Sages Celebrating Gardening: 2015
Mar 23, 2015 10:07 AM CST
They put copper in anti-fouling paint for boats, and that does inhibit marine plant growth. In 'olden times' they used to sheath the bottoms of sailing ships in sheets of copper for that purpose and to protect wooden hulls from barnacles and ship worms. Copper is also a component in algaecide used in swimming pools to keep algae growth down.

Here's an article on it:

Scroll down to point #5 on Environmental impacts if you don't have the patience to read the whole thing.

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
[Last edited by dyzzypyxxy - Mar 23, 2015 10:09 AM (+)]
Give a thumbs up | Quote | Post #814746 (6)
Name: Suzanne/Sue
Sebastopol, CA (Zone 9a)
Sunset Zone 15
Plant Database Moderator Region: California Cottage Gardener Roses Irises Clematis
Garden Photography Keeper of Poultry Hummingbirder Bee Lover Butterflies Million Pollinator Garden Challenge
Mar 23, 2015 10:22 AM CST


Here's an older thread from 2013 where this same question was asked here:
The thread "Pennies in the birdbath..." in Ask a Question forum
My gardening Blog!
Hand sewn wares and vintage finds in my Etsy store. Summer Song Cottage

« Homepage
« Back to the top
« Forums List
« Ask a Question forum
Only the members of the Members group may reply to this thread.

Member Login:



[ Join now ]

Today's site banner is by rocklady and is called "Aquilegia"