Pond-side markers: remembering a koi where it lived
A simple engraved stone set a few feet back from the water, on a gravel base where rain drains away from the water, is a lasting, pond-safe way to mark a koi's place. At one US retailer, engraved garden stones start from $38.95[1].
By the Fish Cremation & Memorial Services editorial team · Updated September 24, 2026 · 6 min read · Sources
- Stone types and real prices, from free to granite
- Placement that keeps your pond water safe
- Plants, engraving and frost-proof footing
The short answer
What's a good way to mark a koi's place by the pond?
Choose a flat or low stone, have it engraved or leave it plain, and set it on compacted gravel a few feet back from the pond's edge where rain runs away from the water, not into it. Add a marginal plant or a new water lily if you'd like something living. That's all a pond-side marker needs to be. To see how a stone fits alongside cremation and other costs, try the memorial budget planner.
Koi keepers often spend more hours beside the pond than anywhere else outdoors. A marker there does something a shelf urn can't: it keeps the fish part of the morning feed, the spring cleanout and the summer evenings, alongside the fish still swimming. It also works whether or not you had your koi cremated.
Which memorial feels right for a fish?
Tap an answer to vote and see how others answered. Anonymous.
Choosing a stone
Which stones suit a pond edge, and what do they cost?
Natural stone blends with rockwork and liners; polished granite reads more like a headstone. Think about what already edges your pond and pick something that looks as if it belongs. Prices below are posted US retail figures for pet memorial stones. By our estimate, engraved garden stones start at about $39 at the median of three US sellers[2], and flat or photo-etched granite at about $158 to $160[3], before any setting fee.
| Marker | Posted price | Good to know |
|---|---|---|
| Smooth river stone, hand-painted or scratched | Free to a few dollars | Repaint yearly; outdoor enamel lasts longer |
| Engraved garden stone | from $38.95[1] | Light enough to move if you rework the pond |
| Engraved natural fieldstone, 6 to 14 in | $38–$115[4] | Up to four lines of text included at one maker |
| Personalized memorial stone | $90–$200[5] | Many designs; check it's rated for outdoor frost |
| Flat granite marker | from $157.95[6] | Heaviest and most permanent; sits flush with the ground |
Lead times vary. One natural-stone maker says engraved pieces arrive in about 1 week[7], while made-to-order granite takes 2–4 weeks[8]. If the loss is fresh, a temporary river stone lets you mark the spot now and choose the permanent one without hurry.
Free tool
Memorial budget planner
Add up cremation, urn, keepsakes and a farewell so the total holds no surprises.
Protecting the water
Where should the marker go so it doesn't harm the pond?
Your remaining fish live in a small, closed body of water, and whatever washes in stays there. The two things to keep out are lime and ash. Fresh concrete and mortar leach lime for weeks, which pushes pH up, and cremated remains are strongly alkaline too, with a pH of ~11.7[9]. Either one running off a marker into the pond can stress koi, especially in a small or shallow pond.
- Set it back. Two to three feet from the edge keeps splash and runoff out of the water and leaves room to net fish and service the skimmer.
- Read the slope. Put the stone where rain drains away from the pond. If the whole garden tilts toward the water, raise the bed slightly or use a planter.
- Skip wet mortar. Bed the stone on sand and gravel. If you must use mortar, let it cure fully and rinse it before rain can carry it in.
- Keep ashes away from the edge. Don't scatter or bury ashes beside the pond; if you want them near the marker, see the soil advice in our biodegradable memorials guide.
- Mind the hidden parts. Liners, underlayment, bottom-drain pipes and pump cables often run under the edge; a stake or spade there can puncture them.
The words
What should you engrave, and how will it weather?
Outdoors, fewer words last longer. A name and years fit comfortably on a small stone, and deep sandblasted letters stay legible longer than shallow laser marks once moss and algae arrive. Some keepers add the variety, such as Kohaku, Showa or Ogon, or the fish's nickname. Because koi can live 30-40 years[10], according to Japan's koi promotion association, the dates alone can make visitors stop and look twice.
- "Hana, Kohaku, 2004 to 2026"
- "First to the surface every morning"
- "Twenty summers in this pond"
- Just a single character or symbol, if words feel like too much
If you plan to add fish to the same stone later, ask the maker to leave space. Engraving a second name onto an existing piece is usually possible, but it's easier on a larger stone. Our memorial ideas for fish has more wording ideas that don't need a stone at all.
Something living
Can you plant a water lily or marginal plant in your fish's name?
Yes, and it can feel like the most fitting memorial of all, because it comes back every summer. A hardy water lily in a planting basket gives shade and cover to the fish that remain. Pot it in aquatic soil or heavy clay, not garden compost or bagged potting mix, which carry fertilizer that can feed algae.
If koi tend to uproot plants in your pond, choose a marginal on a shelf instead: pickerelweed, marsh marigold, native blue flag iris or sweet flag. Stick to plants that are native or legal where you live; water hyacinth and some floating plants are restricted or banned in several US states because they spread into wild waterways; the US Fish and Wildlife Service's aquatic invasive species program explains the harm they cause. Don't mix ashes into the planting basket, for the pH reason above.
Keeping it steady
How do you keep a marker steady through frost, herons and raccoons?
Frost heave tips more pond-side stones than anything else. Dig out 3 to 4 inches, fill with compacted crushed gravel, then add an inch of sand and bed the stone into it. Water drains through the gravel instead of freezing under the stone, so it stays level through winter.
- Herons: a tall stone right at the edge can serve as a handy perch for a hunting heron. A low or flat marker set back from the water avoids offering one.
- Raccoons: they flip small loose stones looking for food. A heavier piece, or one set into gravel, stays put.
- Winter access: in cold regions, place the marker off the path you use to reach the pond heater or de-icer, so you aren't stepping around it in snow.
- Mowing and strimming: a flush granite marker lets the mower pass over; a raised stone needs a small gravel apron to protect it.
Reader polls
What would you choose?
Vote anonymously and see how other readers answered. The results are live counts from people who visit this site, so they show real opinions, not a scientific sample.
Which memorial feels right for a fish?
Tap an answer to vote and see how others answered. Anonymous.
What personal touch matters most on a memorial?
Tap an answer to vote and see how others answered. Anonymous.
Where are (or will be) your pet's ashes?
Tap an answer to vote and see how others answered. Anonymous.
Questions people ask
Can I bury my koi's ashes under the pond-side stone?
You can, as long as the spot is well back from the water and drains away from it. Mix the ashes thoroughly into a generous amount of soil or compost first, because undiluted ash is very alkaline. Don't bury them at the pond edge, in a planting basket or anywhere runoff flows into the pond.
Is a painted rock safe near a koi pond?
Yes on dry land, set back from the edge. Use exterior-grade paint and let it cure for a few days before you place it. Never put a painted or sealed rock in the water or on a plant shelf, because paint and sealer can flake or leach into a small pond over time.
How big should a koi memorial stone be?
Most people choose something between 6 and 14 inches across. That fits a name and dates, is heavy enough to stay put, and doesn't dominate the pond edge. A large flat granite marker suits a long-lived fish or a stone you plan to add more names to over the years.
What plant can I put in the pond to remember my koi?
A hardy water lily is the classic choice and gives remaining fish shade. If your koi dig up baskets, a marginal plant on a shelf lasts better: native blue flag iris, pickerelweed or marsh marigold all work in many US regions. Check that the plant is legal and non-invasive in your state first.
Will a memorial stone crack in winter?
Dense granite and most natural fieldstone cope with freezing well. Cast concrete and some cultured stones can crack if water soaks in and freezes. Check that the product is rated for outdoor use in frost, set it on a draining gravel base, and brush off standing snow before a hard freeze.
Keep reading
Sources and our estimates
- [1] Memorials.com's engraved pet garden stones start at $38.95, cultured-stone markers at $87.95 and flat granite markers at $157.95. Memorials.com – Pet Memorial Stones, 2026.
- [2] Engraved pet garden stones start at about $39 at the median of three US sellers. Our estimate: median of starting prices [$38 Adirondack, $38.95 Memorials.com, $89.99 Comfort Co.]. How we calculate.
- [3] Photo-etched or flat granite pet markers start at about $158–$160 at two US sellers. Our estimate: Memorials.com flat granite from $157.95; Comfort Co. photo granite from $159.99. How we calculate.
- [4] Adirondack Stone Works sells engraved natural-stone pet memorials from $38 (6–7 inch mini) to $115 (13–14 inch large), with 1–4 lines of text included. Adirondack Stone Works Pet Memorials, 2026.
- [5] The Comfort Company's personalized pet memorial stones were priced from $89.99 to about $199.99, with photo granite markers from $159.99. The Comfort Company – Pet memorial stones, 2026.
- [6] Flat granite pet grave markers at Memorials.com start at $157.95. Memorials.com – Pet Memorial Stones, 2026.
- [7] Adirondack Stone Works says engraved pet stones arrive in about a week from ordering. Adirondack Stone Works Pet Memorials, 2026.
- [8] Made-to-order granite and bronze pet markers take 2–4 weeks to produce; garden and cultured stones ship in 3–5 business days. Memorials.com – Pet Memorial Stones, 2026.
- [9] Cremated remains have a very high pH of approximately 11.7, which is toxic to plants without amendment. Larkspur Conservation — Giving Cremated Remains a New Life Through Science, 2024.
- [10] Nishikigoi (koi) typically live about 30 to 40 years depending on their environment. All Japan Nishikigoi Promotion Association - Ancient koi 'Hanako', 2024.
- [11] 11% of UK households keep an outdoor pond with fish. UK Pet Food (formerly PFMA) Pet Population 2026, 2026.
Plan a koi memorial by the water
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