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Is there any danger to my fish if the pond is always in direct sunlight? | Decorative Ponds & Water Gardens Q & A

Q: Is there any danger to my fish if the pond is always in direct sunlight?

Q: Is there any danger to my fish if the pond is always in direct sunlight?

Claudia – De Witt, AR

A: Sunshine has its benefits – but it also has its dangers. Direct sunlight with no shade can raise the water temperature in your pond and reduce the levels of oxygen available to your fish. All those rays can also fuel algae blooms, as well as give your fish a sunburn (yes, really!).

Don’t worry: You don’t need to relocate your water feature to a less sunny locale. There are some easy ways to add shade to your pond, and here’s what we recommend.

  • Terrestrial Shade: Trees, and terrestrial and marginal plants growing alongside your pond can provide plenty of shade from the outside. Blue Flag Iris and Dwarf Cattail, for instance, planted on the south or west side will cast cool, shady shadows for your fish.
  • Get Creative with Canopies: If planting trees or plants isn’t an option, consider installing a tent or canopy over part of your pond. In addition to creating protection from the sunshine, a canopy can also add some dramatic flair to your backyard décor.
  • Aquatic Plants: Aquatic plants, like water lilies and water hyacinth, create scads of underwater shade for your finned pals. Simply plant lilies in baskets or plant bags and place them in strategic spots around your pond or toss in water hyacinth to create a floating hideout.
  • Fish Shelters: For a super easy solution, drop some fish shelters, like our Nycon Koi Kastle Fish Shelter, in your water garden. Another option is to create fish caves with carefully positioned rocks. They’ll create a shady shelter that’ll protect the fish from sun – and predators.

A word of advice: Don’t over shade your pond. You still want to maintain an area with some sunlight, which helps bring out koi colors, keep the water a comfortable temperature and help your plants grow.

If you think your fish are already showing signs of heat stress, check your water temperature with a pond thermometer, like Pond Logic® Floating Pond Thermometer, and do a partial water change if the water temperatures reach the high 70s or above. You might also want to add some pond salt, which will help gill function and reduce fish stress, as well as some Stress Reducer PLUS, which alleviates stress, restores a healthy slime coat and removes dangerous toxins from the water.

Pond Talk: Have your koi or pond fish ever had a sunburn?

Give Your Fish a Break from the Sun - Nycon Koi Kastle Fish Shelters

Can fish get sunburned? | Decorative Ponds & Water Gardens Q&A

Can fish get sunburned?

Q: Can fish get sunburned?
Dustin – Jacksonville, FL

At some point in everyone’s childhood, a kindhearted teacher, seeking to encourage unrestrained curiosity, makes this simple pronouncement: “there’s no such thing as a silly question.” As adults, we know that silly questions do, in fact, exist. As a result, we tend to stop asking questions like “can fish get sunburned?” It’s just too silly to even consider. Sunburned fish? Ha! Hilarious! Except for one small detail: fish can get sunburned. The moral of the story? Your teacher was right. Keep on asking – and we’ll keep right on answering.

As it turns out, Koi fish in backyard ponds and water gardens are particularly susceptible to sunburn. Combine a shallow body of water, limited shade, and long hours of hot, summer sun, and Koi fish suffer from the aquatic equivalent of sunburn.

Like all other fish, Koi fish rely on a natural protective layer – otherwise known as a “slime coat” – that fends off everything from disease to injury. When Koi fish are exposed to too much direct sunlight, their slime coats are compromised, and sickness and lethargy follow quickly. Left unresolved, long-term exposure to sunlight will actually cause a Koi’s untimely demise. Fortunately, it’s a simple problem to fix – and we have the right supplies to do it.

To prevent aquatic “sunburn,” we strongly recommend the use of our Koi Shelter, which allows fish to take refuge from the sun before it causes damage. Like the Koi Shelter, our Aquatic Plants also provide excellent natural protection – along with the added benefit of aesthetic beauty. In addition to those solutions, creative pondkeepers also use rocks to create protective underwater caves, where fish can take a break from the sun’s rays.

Once you’ve taken care to provide adequate shelter for your Koi, the next critical step is to help your fish to restore its slime coat. For a simple solution, we recommend adding an appropriate quantity of salt to the pond. In cases where fish seem particularly lethargic, we strongly encourage the use of Fish Stress Reducer PLUS to resolve the problem quickly – and bring your Koi back to health in short order.

Keep up the questions. We take them all very seriously.

Pond Talk: Have you ever seen a fish get sunburn?

Koi Shelter

I think I spotted some eggs in my pond, do I need to do anything with them? | Decorative Ponds & Water Gardens Q&A

I think I spotted some eggs in my pond, do I need to do anything with them?

I think I spotted some eggs in my pond, do I need to do anything with them?
Kathie- Walnut, CA

If you have koi fish in your pond, there’s a distinct possibility you may be right. If you don’t, we may have a mystery on our hands.

For the purposes of identification, koi eggs are about the size of small beads – or small pinheads. Their color can range from milky white to greenish brown, and you’ll often be able to see black dots – which are developing koi eyes – inside them.

Fortunately, by the time you’ve identified the eggs, Mother Nature is already on the job. But, as a good steward to the future koi of America, you might consider adding some Aquatic Plants to the pond to provide good hiding spots for the fry. With everything from floating plants to pond flowers to submerged oxygenating plants, we have plenty of choices to keep your kiddie koi safe from predators – until they’re ready to make it on their own. For an added measure of protection, consider our Koi Shelters, which provide safe havens for koi of all sizes.

Koi eggs generally hatch within a week. So, within a few days from your first sighting, you’ll be graced with an abundance of koi fry. When they’re first hatched, koi fry can’t swim – so they attach themselves to the sides of the pond to grow. Within three or four days, your koi fry will begin to swim.

While it might be tempting to give your fry a welcome feast, there’s no need. During the first stages of their development, your koi will find sufficient natural food in the pond. By the time they’re approximately three to four weeks old, the koi fry should be between ¼” and ½’ long – and they’ll still be capable of finding sufficient natural food in the pond.

After two to three months, your fry will have reached between 2” and 3” in length. They’ll continue to grow until they’re between fifteen and twenty years old – so they’re just getting started. And with an average lifespan of approximately fifty years, you’ll have plenty of time to appreciate your koi, and the generations of offspring they’re sure to produce.

Pond Talk: Have you had the opportunity to see new koi in your pond?

Aquatic Plants

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