FlytrapCare Carnivorous Plant Forums

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Discussions about anything related to Venus Flytraps, cultivars and named clones

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By vhercastillo
Posts:  30
Joined:  Mon Jun 15, 2020 5:28 am
#357913
Can I use aluminum baking pans/container as a water tray for my carnivorous plants? I like the way they bounce the lights, I was just wondering if it will have an effect on the plants.

Sample pic attached.
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By Propag8
Location: 
Posts:  287
Joined:  Wed Jun 10, 2020 8:43 pm
#357941
They are usually disposable so the coating probably isn't that tough and once water makes direct contact with the alloy it will oxidize and give off some probably harmful by products as well as looking all crusty. If the coating holds up maybe they will be ok im sure someone more experienced will say for definite if they are ok or not. Also they will absorb heat like crazy. Alu can absorb and dissipate heat very rapidly so if your keeping in constant water it may counteract the heat absorption but as for the oxidisation I think it will happen eventually.
By steve booth
Posts:  790
Joined:  Mon Jul 18, 2011 11:15 am
#358018
They arent good for the plants I'm afraid the acidic water rots them and releases the aluminum into the water. I did it once many years ago, they lasted about a year before getting pin holed and leaking, but the plants didn't reach their potential.
Cheers
Steve
By Z_Y
Posts:  9
Joined:  Wed Jun 24, 2020 10:19 pm
#358647
I used to grow a whole terrarium of highland cps in aluminum trays, and did it for maybe ~3 years with no issues. Eventually the the trays started to get little white splotches of crystallization on them, but didn't seem to be dissolvable or harmed the plants in any way. Plus if you just swap out the trays every year it shouldn't be an issue (I was just lazy).

I never really took a picture of my trays, but in this pic you can see the aluminum below.

That being said, aluminum ions are toxic to plants. The oxide that forms is actually not soluble in water and probably harmless like sand, but at a low enough PH he actual aluminum ions start dissolving into the water and may harm roots. It is said online that it harms the roots ability to absorb some nutrients like phosphorous, maybe cps not being dependent on that are a bit more robust to this? But then again in practice I never had any issues. I was growing N. rajah, N. aristolochioides, bunch of helis, etc.
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By nycredneck
Location: 
Posts:  44
Joined:  Mon Jul 16, 2018 9:29 pm
#358908
Aluminum trays I used for things other than growing CP's always got little pinholes in a month or two.
By Propag8
Location: 
Posts:  287
Joined:  Wed Jun 10, 2020 8:43 pm
#358946
Sounds about right Z_Y with the root issue as aluminum chlorohydrate is a very common ingredient in anti perspirant/deodorant im sure it could cause issues with water uptake too.
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