Jump to content

Changed water as garden fertilizer?


Recommended Posts

I'm thinking that, instead of simply disposing the aquarium water resulting from water changes, the aquarium water would make good garden fertilizer. The aquarium water contains nitrates, biodegradables and some nutrients, which the garden plants could utilize. Have you had experience with using the aquarium water as fertilizer or have some thoughts on whether this is a reasonable idea?  Thanks. 

  • Like 4
Link to comment
Share on other sites

I actually put used aquarium water in a 80L (20G-ish) rain barrel to feed my plants. When I clean sponge filters in a bucket, that brown sludge is super nutritious. I feed that to my mullberry tree.

With houseplants, just don't use it all the time, since that might overfertilize the plants, causing damage. Outside, overdosing is pretty much impossible.

  • Like 1
Link to comment
Share on other sites

Yes! Gardens love tank water. 🙂 

If I use it to grow vegetables or other edible things, I will use regular water for a week before harvesting, to “flush out” anything potentially harmful.

  • Like 2
Link to comment
Share on other sites

Birds must have dropped some wild blackberries in the bushes out front of my home. ITs also Where I dump any fish waste I accumulate whenever I use buckets for cleaning my canister. These wild berries are taking over my bushes and I couldn't be happier. I also noticed when I told my wife to grab some fish water for her houseplant that was doing poorly, it ended up growing more in 4 months than in 1 year. 

Link to comment
Share on other sites

I dump all my aquarium water into the yard. Typically it goes into the garden, or raised beds, but the lawn works if I don't feel like swamping smaller plants. I've been at it since I started fishkeeping, but that scare with zebra mussels a few months back has made me much more cautious about what I put down the drain. Plus, water is scarce, I'd hate to waste it if I can help it!

Link to comment
Share on other sites

I use it to water my house and patio plants. I heard about a guy once who plumbed his auto change system to drain into a rain barrel which his sprinkler system pulled from. Apparently he never had to fertilize his lawn again. Not sure where I heard about it/if it's true but it sounds plausible. 

Link to comment
Share on other sites

I have a 2’ X 3’ raised bed in my apartment, in it I grow lots of cherry tomatoes along with jalapeños and scotch bonnet peppers.

Has an internal reservoir that holds about 3 gallons or so, and gets nothing but aquarium water.

Grows so much stuff, I have to give most of it away.

  • Like 2
Link to comment
Share on other sites

I have been using aquarium water for all of my indoor/outdoor plants for years.  Sometimes the need for plant water prompts the water change.

Where I live, every 1$ of water from the faucet costs 3$ to pour down the drain, or water the plants.  Anytime you can use the same water twice, you are ahead. 

  • Like 1
Link to comment
Share on other sites

Yep, as everyone has said, the plants love it! Our snake plant flowered when we started watering it with aquarium water. For outdoor plants, I use aquarium water our pots as well as any plant that’s struggling. I also use aquarium water in vases of cut flowers. (Or I add a half pump of Easy Green to the vase. 😁)

Link to comment
Share on other sites

I use a 100 litre wheelie bin to do my water changes into now, as otherwise I'd drown plants on water change days and they didn't get watered again all week, which wasnt great for peace lillies. Now it all goes into the bin and I just stir up the filth whenever I want to water things throughout the week

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...