Can you water plants with dirty fish aquarium?

If you mean aquatic plants, of course you can, they can help use up the excrement by using it as fertilizer.

Not sure what you mean by saving water, and do you have a filter?

Edit:

Oh, I'm sorry! Of course you can use the fish water, don't worry about the smell much. Good idea ya have there.

When I do my weekly water changes in my tanks, I always use the water for my house plants. The plants are doing wonderful. I have been doing it for years. I do it weekly. Now I would guess to say that if a person did water changes every couple months, that water would be more likely to smell worse.

Every time I do a water change I throw the water I removed from the tank onto my plants. It is great fertilizer! My rose bush has improved immensely since I started doing it and there is no smell. Go for it!

Absolutely. If you've ever heard of using manure as a fertilizer, fish water can work the same way. Lots of nutrients!

Just make sure you don't over-water, or it can grow mold. :)

Yes, that works fine. A bit of fish poop and nitrate thats in the water is good natural fertiliser for your plants.

Ian

yes theres nitrogen in the water from poop and pee thats what plants need look up hydroponics some people grow gardens with fish

You can, but your plants might start smelling like algae.

The smell will be pretty bad, so if they're inside plants, you may not like it.

well if you put the plants than you'll have to clean the tank every 4 days (IF I WERE YOU I WONT PUT THE PLANTS)

yeah! good idea !