# Using Dirty Water On Plants

**URL:** <https://boards.straightdope.com/t/using-dirty-water-on-plants/364472>\
**Category:** Factual Questions\
**Created:** [July 14, 2006, 3:05pm UTC](https://boards.straightdope.com/t/using-dirty-water-on-plants/364472 "2006-07-14T15:05:27Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![Harmonious\_Discord](https://avatars.discourse-cdn.com/v4/letter/h/74df32/32.png) [@Harmonious\_Discord](https://boards.straightdope.com/u/Harmonious_Discord)\
**Post date:** [July 15, 2006, 8:55pm UTC](https://boards.straightdope.com/t/using-dirty-water-on-plants/364472/21 "2006-07-15T20:55:22Z")

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[QUOTE=Zsofia]  
You ought to be doing regular water changes anyway, not just when you think about the plants, FYI. 😉  
[/QUOTE]

I only have to change the water once a year and it’s crystal clear. I run an underground suction biological filter, with an external canister filter pump. I double the life for the canister’s carbon and amonnia removal medium, when I remove a gallon to water the plants. I do it for the plants more than the fish. I of coarse stop using it on plants, when adding treatments for disease. I do a gravel cleaning with the wand attachment for the canister filter pump, every two weeks. Like I said it’s crystal clear.

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