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 Post subject: Metals/Materials Check
PostPosted: May 7th, '18, 23:30 
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Does anyone know if these metals are ok in a fish tank?

-- Generic aluminum window screen mesh
-- Chrome plated, stainless steel food drainage tray:

e.g. https://www.centralrestaurant.com/Steam ... f4QAvD_BwE

I was presuming that food safe meant fish safe, but the chrome plated tray is already rusting a little...

Thanks so much for your help!


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PostPosted: May 8th, '18, 07:42 
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Aluminium - NO
Chromium - NO
Stainless Steel - OK
Rusty Iron - OK

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PostPosted: May 13th, '18, 00:12 
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Thanks. Is it possible to note your reasoning or the source of your information? I'm sure you're right, I'm just trying to understand everything...


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PostPosted: May 13th, '18, 15:55 
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Many metals are toxic to fish in very low concentrations, an internet search will turn up lots of references to papers about the subject.
Stainless steel is non-reactive with the water found in AP systems, so the toxic-to-fish metals it contains don't leach out.
Here's some info about rust in water: https://corrosion-doctors.org/Experimen ... mistry.htm - it isn't very soluble. A bit of contact with rusty Iron wont put much Iron into the water, but you dont want a large area exposed.

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Chrome plated, stainless steel food drainage tray...


I doubt there is such a thing. Stainless steel doesn't need Chromium plating, and wont rust unless of poor quality, due to exposure to AP water.

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My small AP system: http://backyardaquaponics.com/forum/viewtopic.php?f=18&t=16345
Larger 2nd system: http://www.backyardaquaponics.com/forum/viewtopic.php?f=18&t=24153
Solar powered Gunagulla Organic Garden
Fruit +Loomberah Wx
http://gunagulla.com


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