Koi Care Basics Blog

There is no reason that Koi and Koi pond plants can’t co-exist, however many Koi owners are very reluctant to mix the two. The main reason for this is that these fish are voracious eaters and will consume almost anything they can fit into their mouths!

Koi are by nature very curious and each has a unique personality. Koi pond plants might become food, provide entertainment or even be ignored. Unfortunately there is no way to predict how your particular fish will react.

Koi & Pond Plants

In general it works out better to introduce your Koi into a planted pond than to introduce a Koi pond plant into an established Koi pond. Koi are curious fish and will go over to investigate the new addition. Then, if one begins to nibble on the plant they will all nibble on the plant as they learn from each other.

However, if you put a few new Koi into an already planted pond chances are that they’ll probably leave the plants alone. Exploring a new environment and finding new things to do can occupy them, thus providing a bit of protection for the plants.

Koi pond plants that have recently been potted do not have well developed root systems to help hold the soil in the pot and the plant in the soil. If your Koi can find any way to get to the soil they will uproot your plant. Rooting is an instinctive behavior for members of the carp family.

One way to keep them out of the soil is to place rocks on top of the dirt. Of course this only works when the rocks are larger than the Koi’s mouth and it won’t prevent them from pushing the rocks out of the pot.

To prevent that from happening you can plant in a pot that is two or more times deeper than the dirt. If the Koi want to get at the dirt they’ll have to stand on their head which is quite uncomfortable for them. Even so, you still need to place the rocks over the soil.

Another option for protecting roots is to grow your Koi pond plants without soil. You can plant them in plastic net baskets with golf-ball size lava rocks. The fish aren’t interested in the rough textured rock, your plants will get their nutrients from the water and the spaces in the rocks allow bacteria to grow. This method will both help keep the Koi away from the roots and help keep your pond water clear.

Leaves are considered a delicacy by bored or hungry Koi fish. There are a couple of ways to handle this problem. You can make sure your Koi are well fed and offered a variety of foods, including fresh and / or rotate pots in and out of the pond. Pots sitting out of the pond give plants a chance to recover while the pots in the pond are available as a tasty snack! Watercress and water celery are particularly good for this.

Keep the plants that you most want to protect in shallower water and at the edges of your pond to make them harder for your Koi to reach. They aren’t averse to coming up out of the water a little ways to get to a delicious meal!

The addition of fast multiplying duckweed or mosquito fern to the pond offer a nice alternative to your more prized Koi pond plants.

As your Koi get larger you might need to separate your plants from your fish. Often barriers can work well. Most of these include netting with holes just large enough for Koi fry and water currents to pass through. Your success rate with netting can vary as the fish can learn to wiggle over the floating nets. If one does it the others
wil surely follow since Koi are quick learners. However you could get lucky and they may not figure it out.

Koi pond plants

Some Koi enthusiasts build cages from wire around their plants and this can work well as long as you are certain that there are no sharp edges for your fish to get scratched on. Opportunistic diseases can take over if an open sore or scratch is available to fester in.

A last thing to keep in mind is that many Koi ailments are treated with salt and some Koi keepers keep a minimum salt level in their ponds. This is probably okay as long as it is a very low level. A pound of salt per 100 gallons of water will kill all of the submerged plants.

If you have a sick fish and want to medically treat i with salt you will need a higher concentration and should remove it to a seperate tank for treatment purposes.

If you are careful and do some planning you should have very little trouble with Koi pond plants.

To learn more about how to take care of Koi pond plants visit KoiCareBasics.com

Alan Deacon
KoiCareBasics.com