As the weather starts to turn and temperatures drop, it’s time to think seriously about how to prepare your Koi pond for the winter months. At SJ Koi Carp in Kent, we know how much time and care goes into keeping your Koi healthy and your pond thriving. Winter is a challenging time for pond owners, but with the right steps, your fish will stay strong and healthy until spring.
Here’s our practical guide to seasonal Koi care to help you get ready. And remember, everything you need from food to filters is available in our shop, along with expert advice from people who live and breathe Koi care.
Know What Winter Means for Your Koi
Koi are hardy fish, but they are not immune to changes in temperature. As water temperatures fall below 10°C, your Koi’s metabolism slows right down. They become less active and stop feeding. If your pond is not properly maintained before this point, your fish can become stressed, sick, or worse.
Getting ahead of the season is the best way to prevent problems later on. At SJ Koi Carp, we stock everything you need to make winter easy on your fish and your pond system.
Step 1: Clean the Pond Thoroughly
Before temperatures drop too low, give your pond a proper clean. Remove fallen leaves, plant debris, and sludge from the bottom. Decaying organic matter releases harmful gases like ammonia and can lower oxygen levels in the water.
Netting your pond during autumn is a smart move to reduce leaf buildup. If you need a pond vacuum, net, or skimmer, we have a range of tools in-store to help you tackle pond cleaning properly.
Step 2: Check and Adjust Filtration
As biological activity slows in colder water, so does the efficiency of your filter system. But that does not mean you can neglect it. Clean your filters now to make sure they are running at their best. You might also consider switching to a winter-friendly media that works well in lower temperatures.
We carry a wide range of filters and filter media at SJ Koi Carp, ideal for every setup from small garden ponds to advanced multi-chamber systems. If you are not sure what you need, give us a ring or stop by the shop and we will point you in the right direction.
Step 3: Monitor Water Quality
Good water quality is critical all year, but especially in winter when your fish are more vulnerable. Test your water regularly for ammonia, nitrite, nitrate, pH, and KH levels. Stability is the key to avoiding stress and disease.
We stock reliable water test kits and treatments to correct imbalances fast. If you are unsure how to interpret your test results, just ask us. We are happy to explain what your numbers mean and how to fix any problems.
Step 4: Switch to a Wheatgerm-Based Food
As temperatures drop below 12°C, switch to a high-quality wheatgerm-based food. It is easier to digest and reduces the risk of uneaten food rotting in the water. Once the water temperature dips below 8°C, stop feeding altogether.
Our shop carries trusted Koi food brands that support your fish through every season. If you’re not sure when to stop feeding or what brand to go with, our team will help you choose the right product.
Step 5: Keep an Eye on Equipment
Before winter really sets in, check that all your equipment is working as it should. Pumps, air stones, heaters, de-icers and UV clarifiers all play a role in keeping your pond stable. If anything is worn out or underperforming, replace it now.
We offer a solid selection of pond accessories and can order in anything specific you need. If you do not see what you’re looking for on our website, give us a call. We will do our best to help.
Step 6: Book an Appointment for Expert Help
Sometimes the best option is to get hands-on advice in person. That is why we now offer weekend and evening appointments at our shop in Kent. Whether you are looking to buy new Japanese Koi, upgrade your filtration system, or just get some winter prep advice, we are here for you.
Appointments must be booked at least four hours in advance using our online system. It is quick and easy to schedule a visit that works for your timetable.
Visit Us in Kent or Browse Online
At SJ Koi Carp, we specialise in Japanese Koi and everything you need to support them. Our fish are hand-picked for quality and health. Whether you are an experienced keeper or just starting out, you will find top-grade Koi, food, treatments, equipment and accessories in our shop.
If you cannot visit during regular hours, take advantage of our new flexible booking system. Just head over to our website and book a time slot that suits you. All we ask is that you do it at least four hours before your visit so we can confirm and prepare for your arrival.
If you have questions or need help choosing a product, we are only a phone call away. Our team is passionate about Koi keeping and always ready to help you make the best decisions for your pond.
