Natural Limestone Aquarium Plant Anchor: Lake Michigan Rock for Neutral to Basic pH Tanks - Lead-Free Plant Weight Alternative
$6.75
Natural limestone aquarium plant anchor from Lake Michigan. Lead-free, pH-buffering, and safe for freshwater tanks. Great for diggers like cichlids.
Keep Your Live Aquarium Plants Secure—Naturally
Tired of plants constantly floating up or getting uprooted by busy tank mates? These natural white, cream, tan, and gray limestone plant anchors offer a safe, effective, and attractive solution for keeping live aquarium plants in place—without the risks of lead or artificial materials.
Hand-selected from Lake Michigan beaches, each limestone anchor is 100% natural, hand-drilled, and free of coatings or chemicals. They're a safe, non-toxic alternative to metal plant weights—perfect for freshwater aquariums and even small pond setups. Each stone includes a single beveled hole designed to hold stem or rooted plants firmly in your substrate, keeping your aquascape intact and low-maintenance.
These limestone anchors are especially helpful for tanks with diggers like cichlids, plecos, gouramis, corydoras, oscars, and crustaceans—all of whom are notorious for unearthing plants and creating chaos.
🌿 Aquarium Compatibility & pH Information
Natural limestone has a pH of 7 and may slowly raise the pH of more acidic water (under 7.0), making it an effective buffer in many setups. It’s compatible with a wide range of freshwater species, including:
Bettas, mollies, guppies, platies, swordtails
Cichlids, corys, plecos, goldfish
Even kuhli loaches and other more sensitive fish in neutral pH environments
If your water needs to stay below 6.5 due to fish species, consider using granite, basalt, or sandstone anchors from my shop instead.
One of the unique benefits of limestone is the contrast it provides against dark substrates, adding visual interest to your tank while still looking completely natural.
📏 Size Options (approximate ranges)
Each stone is naturally unique in shape, tone, and texture. Sizes vary slightly, and listing photos are representative of what you’ll receive:
Extra Small Limestone
• Length: 1.7–2.2 in
• Width: 1.3–1.8 in
• Depth: 0.4–0.7 in
• Hole Diameter: 0.5 in
Ideal for nano tanks and small plants.
Small Limestone
• Length: 2–3 in
• Width: 1.5–2.2 in
• Depth: 0.5–1.25 in
• Hole Diameter: 0.5 in
Medium Limestone
• Length: 2.5–3.6 in
• Width: 2–2.6 in
• Depth: 0.75–1.25 in
• Hole Diameter: 0.5 in (0.7 and 1 in options)
Two-Hole Limestone
• Length: 2.75–3.75 in
• Width: 2–2.75 in
• Depth: 0.7–1.4 in
• Hole Diameter: 0.5 in
Ideal for larger plant groupings.
Need a larger hole size for Java fern, Anubias, or Amazon sword? Just message me—I’m happy to accommodate special requests!
📦 Shipping Savings & Extras
Buying three or more stones or mixing different types/sizes? You’ll almost always receive a partial shipping refund. Most multi-item orders ship for $6–$8, and any overage over $1.00 will be refunded.
Each order includes a piece of Seapora filter—perfect for wrapping fine stems before roots develop.
🌊 More Natural Stone Plant Weights Available
Looking for other plant anchors—like granite, sandstone, basalt, or even aquarium safe cairns? Explore my full selection here:
🌿 stonecairns.com
🌿 etsy.com/shop/StoneCairns
Shipping from United States
Processing time
1-2 business days
Customs and import taxes
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Payment Options
Returns & Exchanges
I gladly accept returns, exchanges, and cancellations
Just contact me within: 3 days of delivery
Ship items back to me within: 7 days of delivery
Questions about your order?
Please contact me if you have any problems with your order.
Privacy policy
Etsy Seller: Michael Wilson, Michael’s Privacy Policy
This Privacy Policy describes how and when I collect, use, and share information when you purchase an item from me, contact me, or otherwise use my services through Etsy.com or its related sites and services.
This Privacy Policy does not apply to the practices of third parties that I do not own or control, including Etsy or any third party services you access through Etsy. You can reference the Etsy Privacy Policy to learn more about its privacy practices. Nathan should then go on to include information on the following:
Information I Collect
To fulfil your order, you must provide me with certain information (which you authorized Etsy to provide to me), such as your name, email address, postal address, payment information, and the details of the product that you’re ordering. You may also choose to provide me with additional personal information (for a custom order of jewelry, for example), if you contact me directly.
Why I Need Your Information and How I Use It
I rely on a number of legal bases to collect, use, and share your information, including:
• as needed to provide my services, such as when I use your information to fulfil your order, to settle disputes, or to provide customer support;
• when you have provided your affirmative consent, which you may revoke at any time, such as by signing up for my mailing list;
• if necessary to comply with a legal obligation or court order or in connection with a legal claim, such as retaining information about your purchases if required by tax law; and
• as necessary for the purpose of my legitimate interests, if those legitimate interests are not overridden by your rights or interests, such as 1) providing and improving my services. I use your information to provide the services you requested and in my legitimate interest to improve my services; and 2) Compliance with the Etsy Seller Policy and Terms of Use. I use your information as necessary to comply with my obligations under the Etsy Seller Policy and Terms of Use.
Information Sharing and Disclosure
Information about my customers is important to my business. I share your personal information for very limited reasons and in limited circumstances, as follows:
• Etsy. I share information with Etsy as necessary to provide you my services and comply with my obligations under both the Etsy Seller Policy and Etsy Terms of Use.
• Service providers. I engage certain trusted third parties to perform functions and provide services to my shop, such as delivery companies. I will share your personal information with these third parties, but only to the extent necessary to perform these services.
• Business transfers. If I sell or merge my business, I may disclose your information as part of that transaction, only to the extent permitted by law.
• Compliance with laws. I may collect, use, retain, and share your information if I have a good faith belief that it is reasonably necessary to: (a) respond to legal process or to government requests; (b) enforce my agreements, terms and policies; (c) prevent, investigate, and address fraud and other illegal activity, security, or technical issues; or (d) protect the rights, property, and safety of my customers, or others.
Data Retention
I retain your personal information only for as long as necessary to provide you with my services and as described in my Privacy Policy. However, I may also be required to retain this information to comply with my legal and regulatory obligations, to resolve disputes, and to enforce my agreements. I generally keep your data for the following time period: 4 years.
Transfers of Personal Information Outside the EU
I may store and process your information through third-party hosting services in the US and other jurisdictions. As a result, I may transfer your personal information to a jurisdiction with different data protection and government surveillance laws than your jurisdiction. If I am deemed to transfer information about you outside of the EU, I rely on Privacy Shield as the legal basis for the transfer, as Google Cloud is Privacy Shield certified.
Your Rights
If you reside in certain territories, including the EU, you have a number of rights in relation to your personal information. While some of these rights apply generally, certain rights apply only in certain limited cases. I describe these rights below:
• Access. You may have the right to access and receive a copy of the personal information I hold about you by contacting me using the contact information below.
• Change, restrict, delete. You may also have rights to change, restrict my use of, or delete your personal information. Absent exceptional circumstances (like where I am required to store data for legal reasons) I will generally delete your personal information upon request.
• Object. You can object to (i) my processing of some of your information based on my legitimate interests and (ii) receiving marketing messages from me after providing your express consent to receive them. In such cases, I will delete your personal information unless I have compelling and legitimate grounds to continue using that information or if it is needed for legal reasons.
• Complain. If you reside in the EU and wish to raise a concern about my use of your information (and without prejudice to any other rights you may have), you have the right to do so with your local data protection authority.
How to Contact Me
For purposes of EU data protection law, I, Michael Wilson, am the data controller of your personal information. If you have any questions or concerns, you may contact me at stonecairns@gmail.com. Alternately, you may mail me at:
Michael Wilson, 1105 Bryant Street, Kalamazoo, MI 49001 USA
Frequently Asked Questions
Custom and personalized orders
I do accept custom orders.