Hdpe Barrel Question
#1
Posted 21 August 2012 - 09:15 PM
I have found a source of HDPE barrels that have stored nitric acid for transport. Nitric acid is water soluble and I have read on Murray Hallams site that it can be used to gradually reduce ph in an AP system. Logically this means that if used correctly it is not toxic to fish or plants. The chemical engineer of the company selling the barrels says that HDPE does not hold any residual from chemical stored in it but I would like a few other opinions from anyone with relevant knowledge of this chemical or this product (HDPE).
My question is then can these barrels be safely used as growing beds to create a DIY AP system?
Thanks for your time and wisdom.
Danny
#2
Posted 21 August 2012 - 09:44 PM
#3
Posted 21 August 2012 - 10:07 PM
You should be right with them.
Give them a good rinse, nitric acid is very soluble, and incredibly fun for reasons not to be mentioned...
The high ph level of our water should neutralise anything remaining pretty quick.
Add tap water and leave for a week.
If ph is stable the acid wont be leaching out, if it drops over the week you might want to add limestone or something to try to react with it to neutralise it.
#4
Posted 22 August 2012 - 08:29 AM
#5
Posted 22 August 2012 - 06:48 PM
Andrew if you read this again what has been your experience as far as stocking ratio's goes? I was think to just keep testing the water once the system is mature and either decreasing fish or increasing plants to keep nitrates stable around 40ppm. Probably a little too complex. Your thoughts?
Cheers,
Danny
#6
Posted 22 August 2012 - 07:54 PM
The general rule is 25 fish per 500L of growbed/filter media. This will allow fish to reach around the 750 gram mark without over stocking the system.
Obviously you would start removing the bigger ones early, but you need to allow for their adult weight.
Remember you will need to add air as well. I lost all my trout when I had power out for 6 hours due to low DO
#7
Posted 23 August 2012 - 12:52 AM
cmon...... do tell ???
#8
Posted 23 August 2012 - 09:00 AM
#9
Posted 30 August 2012 - 06:07 PM
probably something like this... 2 (NH2)2CO + 2 HNO3 + H2SO4 -> 2 N2O + 2 CO2 + (NH4)2SO4 + 2 H2O
most fun thing that i could come up with anyway...
Edited by tranced, 30 August 2012 - 06:08 PM.
#10
Posted 30 August 2012 - 07:18 PM
they do all sorts of plastic moulded buckets barrels etc.
cheers,
Con.
#11
Posted 30 August 2012 - 10:41 PM
#12
Posted 31 August 2012 - 09:28 PM
#13
Posted 01 September 2012 - 11:31 PM
most fun thing that i could come up with anyway...
nitrous oxide can be useful - but how do you collect that and not the carbondioxide... whats with the ammonium sulphate ??? and i dont need the water !!!! lol...
good to see you can balance your chemical equations... see you are useful for something
#14
Posted 01 September 2012 - 11:56 PM
Not even close. Try harder
#15
Posted 02 September 2012 - 10:03 AM
edit: explosives, eh
Edited by tranced, 02 September 2012 - 10:05 AM.
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