my rice experiment

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Copied from another thread, you might want to also check for traces of zinc and copper.

Continue usage of rice and you could also end up with too much potassium , but since people dose K anyway if could be a benefit.

It's just the heavy metal that worries me.




According to nutrition facts on raw white rice, among other things like here's the mineral content of 1 serving (185g) of white rice:
http://www.nutritiondata.com/facts/c...d-pasta/5721/2

Calcium 20.4mg
Iron 3.0mg
Magnesium 42.6mg
Phosphorus 131mg
Potassium 142mg
Sodium 13.0mg
Zinc 2.2mg
Copper 0.3mg
Manganese 1.8 mg
Selenium 27.9 mcg

I think that's too much Zinc and Iron in grains of rice for reef aquarium?


Sent from my iPhone using Tapatalk
 
I've done some really rough calculations based on the weight concentration of the heavy metal in NSW, using Randy's data:
http://reefkeeping.com/issues/2005-11/rhf/index.php

Copper: 380ng/L
Zinc: 590ng/L
Manganese: 165ng/L
Iron: 140ng/L

Using a ng to mg covertor:
http://www.translatorscafe.com/cafe/units-converter/mass/calculator/nanogram-%5Bng%5D-to-milligram-%5Bmg%5D/

With your 105G water, which is approx. 400L water, at NSW level you shouldn't have more than:

Copper: 0.000380mg/L x 400L = 0.140mg
Zinc: 0.000590mg/L x 400L = 0.236mg
Manganese: 0.000165mg/L x 400L = 0.066mg
Iron: 0.000140mg/L x 400L = 0.056mg

Please correct me if my calculation is wrong Randy :)

Now one cup (185g) of white rice will give you:

Copper: 0.3mg
Zinc: 2.2mg
Manganese: 42.6mg
Iron: 3.0mg

If you'd ask me I think you're poisoning your tank with heavy metal, it'll just be a matter of time before the signs will start to show.

Good luck.
 
If that much zinc being releast in reef saltwater most of become Zn(oh)2, ZnCO3. I understand what copper, iron, does. But I like to know more on Zinc and Managanese.
 
Acrotrdco said:
I've done some really rough calculations based on the weight concentration of the heavy metal in NSW, using Randy's data:
http://reefkeeping.com/issues/2005-11/rhf/index.php

Copper: 380ng/L
Zinc: 590ng/L
Manganese: 165ng/L
Iron: 140ng/L

Using a ng to mg covertor:
http://www.translatorscafe.com/cafe/units-converter/mass/calculator/nanogram-[ng]-to-milligram-[mg]/

With your 105G water, which is approx. 400L water, at NSW level you shouldn't have more than:

Copper: 0.000380mg/L x 400L = 0.140mg
Zinc: 0.000590mg/L x 400L = 0.236mg
Manganese: 0.000165mg/L x 400L = 0.066mg
Iron: 0.000140mg/L x 400L = 0.056mg

Please correct me if my calculation is wrong Randy :)

Now one cup (185g) of white rice will give you:

Copper: 0.3mg
Zinc: 2.2mg
Manganese: 42.6mg
Iron: 3.0mg

If you'd ask me I think you're poisoning your tank with heavy metal, it'll just be a matter of time before the signs will start to show.

Good luck.
Click to expand...

I like to take risk but only calculated risk. Numbers don't lie. This worries me. I have to rethink about continuing my experiment. I got too much time and money invested to risk poisoning my tank with these heavy metals. Good luck to you all. I will still tag along.
 
Simon nothing wronge if you feel it not safe to. Better then safe then sorry. But reefer have been running there system for 5 to 10 year plus year and all out of no where starte losing livestock left and right.
 
To be compare properly to NSW levels of copper etc, you would need to account for how long the rice lasts, and how many water changes take place, whether any gets skimmed out as part of the bacterias consummption etc.. The Cu in your salt mix doesn't just accumulate indefinitely, some is used by the marine life. and the .3 mg in rice isn't added to the water column all at once. If it is released at a rate that doesn't increase the NSW levels appreciably, it would get used or changed out with the w/c. It is only when it is above a certain level that toxicity symptoms occur. Is adding .3 mg to 100 gals over 3 months a problem? I don't know. You would need to test for those metals in the water column before, and after several months to know anything.

http://www.chemet.com/file.asp?F=Co...per+and+the+Ocean+Environment1.PDF&C=articles
 
Last edited:
noahm said:
To be compare properly to NSW levels of copper etc, you would need to account for how long the rice lasts, and how many water changes take place, whether any gets skimmed out as part of the bacterias consummption etc.. The Cu in your salt mix doesn't just accumulate indefinitely, some is used by the marine life. and the .3 mg in rice isn't added to the water column all at once. If it is released at a rate that doesn't increase the NSW levels appreciably, it would get used or changed out with the w/c. It is only when it is above a certain level that toxicity symptoms occur. Is adding .3 mg to 100 gals over 3 months a problem? I don't know. You would need to test for those metals in the water column before, and after several months to know anything.

http://www.chemet.com/file.asp?F=Co...per+and+the+Ocean+Environment1.PDF&C=articles
Click to expand...

I'm not too worried about copper, it's only 2 times higher. With the timed release it might be okay.

However zinc content in rice is 10 times higher, iron is 60 times higher and manganese is 700 times higher, even with timed release, manganese alone already pushed it too far.

Again, only time will tell if this works.
 
Du said:
IMO this must be succesfuly binded by active carbon as complex organic compounds (edited)
Click to expand...


wouldn't a carbon reactor help with all the metals. there are people on here that use strate tap water for there make up and successfully keeping LPS and SPS. i may be wrong but i think there would be more in tap water then can be released by the rice

FWIW i'm going to be the next one trying it starting to night when i get off work
 
I have a 55gal FW tank that I use API Tap Water Conditioner.

API Tap Water Conditioner - Removes Heavy Metals Such As Copper, Lead, and Zinc That Are Found In Most Tap Water Supplies. These Metals Are Toxic To All Tropical Fish. API Tap Water Conditioner makes water safe when tap water is used in aquariums.
API Tap Water Conditioner Benefits: Works to instantly detoxify heavy metals such as copper, lead, and zinc. Also removes chlorine and breaks the chloramine bond.
* 16 oz. bottle (473 ml)
* Treats up to 9,460 gallons

Could this be used in our SW tanks to remove heavy metals if there is such a build up over time while maintaining water changes?

*edit--- I'm not pushing this brand, it's what I use and there is other products that produces the same effect.*
 
Last edited:
dez_2121 said:
wouldn't a carbon reactor help with all the metals. There are people on here that use strate tap water for there make up and successfully keeping lps and sps. I may be wrong but i think there would be more in tap water then can be released by the rice

fwiw i'm going to be the next one trying it starting to night when i get off work
Click to expand...

+1
 
dez_2121 said:
wouldn't a carbon reactor help with all the metals. there are people on here that use strate tap water for there make up and successfully keeping LPS and SPS. i may be wrong but i think there would be more in tap water then can be released by the rice

FWIW i'm going to be the next one trying it starting to night when i get off work
Click to expand...
I would think so since it pulls copper out of water after treating sick fishes in QTs. Does active carbon pull all heavy metals?
 
dez_2121 said:
wouldn't a carbon reactor help with all the metals. there are people on here that use strate tap water for there make up and successfully keeping LPS and SPS. i may be wrong but i think there would be more in tap water then can be released by the rice

FWIW i'm going to be the next one trying it starting to night when i get off work
Click to expand...

Also it must be pulled by skimmer. Here is Randy's article about metalls in aquarim.

http://www.reefkeeping.com/issues/2003-04/rhf/feature/index.php
 
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