Oil in RO/DI water holding drum?

[afqu]

I was out of town and my mag 7 quit working. My husband and helper took it apart and cleaned it. The helper put a "tiny" bit of oil on the impeller assembly and put the pump in my holding water to test it..........gggrrrrr. Upon returning home and getting top off water I saw the oil film, plus heavy oily smell, so I just made enough RO/DI for top off in another bucket for the time being. Next day helper explained what he had done. I emptied my 30 gallon, human grade blue drum. Cleaned with a tad of Dawn, then rinsed and rinsed, then vinegar wash/scrub.

Made 20 gallons of RO/DI the next day and it still smelled of oil although no oil film on top. I have it now sitting full with a diluted bleach solution, outside in FL for a day or two. I will rinse good and let sit in sun for a day. If it still smells of oil after this, is there anything I can safely use to rid of any oil residue. The drum has never had anything in it except the RO/DI for the 14 years that I have used it.
Thanks for any help.

 

[AllSignsPointToFish]

My old mixing pump did the same thing. I never had any problems as long as you don't empty the entire contents of the drum. Make sure your skimmer is running and you've got fresh activated carbon. Wash the barrel with Dawn when you've finished the water change, rinse and dry properly to remove residual oil.

 

[AllSignsPointToFish]

Next time, make sure they have food grade silicone grease available instead of oil

 

[afqu]

Next time, make sure they have food grade silicone grease available instead of oil

I wasn't here, and the helper had no idea about reef tank safety procedures. Would you even need to put silicone on a magnetic impeller assembly? I would not have thought to do that.

 

[AllSignsPointToFish]

I wasn't here, and the helper had no idea about reef tank safety procedures. Would you even need to put silicone on a magnetic impeller assembly? I would not have thought to do that.

I actually use the silicone grease on all of my mag drive pumps after cleaning to keep the ceramic bearings from seizing.