Automatic irrigation considerations

[MateoinLosAngeles]

I'm planning to set up some sort of automatic irrigation system in my small outdoor area that doesn't have a water outlet. Since I make my own RO water I was planning to use a bucket with a water pump as my water reservoir and simply fill it up whenever it's empty.

Any considerations about storing still water? Mainly my questions are: can I leave it mixed with fertilizer or do I need to connect an injector, do I need to worry about aeration, what about microbial growths?

Any tips would be greatly appreciated!