Can you use fishing weights in an aquarium?

Geoff Stadnyk in Fishing Accessories on

Do you have an aquarium and are looking for a way to weigh down your plants? Or maybe you’re looking for a way to anchor decorations in the tank. If so, fishing weights might be the solution you’re looking for! In this blog post, we will answer the question “can you use fishing weights in an aquarium?” We’ll also discuss how to choose the right weight and what to avoid.

Table of Contents

Can you use fishing weights in an aquarium?

Yes, you can use fishing weights in an aquarium; fishing weights were designed for a very similar purpose and will do a nice job weighing down features in your aquarium.

Fishing Weights in Aquarium: Things To Consider

There are a few things to consider when using fishing weights in an aquarium.

Led fishing weights. Bullet Weights Cannonball Sinker : Fishing Sinkers : Sports & Outdoors

Choose the right weight

First, you’ll need to choose the right weight. The weight you choose should be heavy enough to hold down your plants or decorations, but not so heavy that it will damage the tank or its inhabitants. You’ll also want to make sure the weight you choose is not magnetic, as magnets can be harmful to fish.

Avoid toxic materials, such as lead

Second, you’ll want to avoid using weights that are made of lead. Lead is toxic to both plants and fish and should never be used in an aquarium. Generally, fishing weights are made out of lead-free materials, but it’s always a good idea to check before using them.

Check that the fishing weights are secured

Finally, it’s important to use caution when adding a weight to your tank. Make sure the weight is securely fastened to whatever you’re anchoring and that there’s no danger of it slipping into the water and harming your fish.

How to use fishing weights in an aquarium

Now that you know whether or not you can use fishing weights in an aquarium and what to consider when doing so, let’s take a look at how to actually use them.

If you’re using the weight to weigh down plants, simply attach the weight to the stem of the plant using wire, string, or fishing line (see also how long does fishing line lasts).

Stem Wire

Use a stem wire to attach your weights to your aquarium plants.

Stem Wire, Floral Wire

This stem wire, also known as floral wire, is bendable and can be shaped in any way you like. It's also strong enough to stay put and can be cut with scissors.

Recommended Stem Wire for Weights in an Aquarium

Fishing Line

Use an invisible fishing line to secure your aquarium plants.

Clear Fishing Wire

The clear fishing wire is composed of high-quality nylon, is flexible and durable, and is strong enough to tie aquarium plants to fishing weights.

Fishing Wire 492FT

This inexpensive fishing line is perfect for securing aquarium plants.

Recommended Fishing Line for Weights in an Aquarium

If you’re using the weight to anchor decorations, use a zip tie or some other type of fastener to attach it securely to the decoration.

Zip Tie

Tie your fishing weights to any aquarium decorations with a zip tie.

HS Clear Zip Ties 6 Inch Small

This inexpensive and long-lasting zip tie is perfect for securing your fishing weights to any aquarium decorations.

Recommended Zip Tie for Weights in an Aquarium

Be sure to test your setup before adding any water and plants! It’s always a good idea to do a test run with some empty containers before filling up your aquarium.

Are fishing weights expensive?

Generally, fishing weights are not expensive and can be found at most sporting goods stores. However, it’s always a good idea to shop around to find the best deal. You might also be able to find used fishing weights at a flea market or online auction site. Just be sure to check that they are made of lead-free materials before using them in your aquarium.

Is fishing line safe for aquariums?

Man Preparing fishing line

Fishing line is generally safe for aquariums (and for hanging pictures), but it’s always a good idea to check with the manufacturer before using it. Some types of fishing line can be harmful to fish if they ingest it. Generally, you’ll want to avoid fishing lines that contain lead, as lead is toxic to fish. There are many types of fishing lines like braided fishing lines that are safe for aquariums, so there’s no need to worry if you’re not sure whether or not your line is safe. Just be sure to do a little research before using it in your tank.

Alternatives to fishing weights for an aquarium

If you’re not comfortable using fishing weights in your aquarium, there are a few alternatives you can try.

One option is to use large stones or bricks as weights. Make sure the rocks are clean and free of any harmful materials before adding them to your tank.

Another option is to use lead-free weighting material specifically designed for aquariums. This material is available in a variety of shapes and sizes, making it a versatile option for aquarists of all levels.

Whatever method you choose, be sure to use caution when adding any type of weight to your aquarium. Always test the setup before adding water and plants!


If you’re looking for a way to weigh down your plants or decorations, fishing weights might be the perfect solution. Just make sure you choose the right weight and avoid using lead-based fishing weights since they can be dangerous.

If you like fishing, you will love our articles and guides here about fishing.

Geoff Stadnyk

Geoff started fishing as a child in the gorgeous lakes of Mammoth, while on family vacations. His fishing experience includes the use of fly rod and reel. Guided trips along the Madison and Gallatin rivers in Montana, the Frying Pan and Animus in Colorado, and the Deschutes river in Oregon have all paid off and helped make Geoff the angler and writer that he is today.

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