Only use proper aquatic compost as other general composts contain chemicals, which will leach into the water and poison your pond life. Any gravel or stones must be lime free and should be rinsed prior to use. Always give new plants a thorough rinse, to remove snail eggs and fairy moss etc, prior to introducing them into your pond. We recommend that you wear arm length rubber gloves when putting your hands into pond water so as to avoid infections, especially if you have cuts or know of a possible rat problem nearby.
Large fish such as koi will naturally graze around the plants roots, loosening the compost and causing the plants to drift out from their baskets, destroying your planting. You need to ensure that adequate protection is provided to avoid them being uprooted by covering the aquatic compost with an inch of washed aquatic gravel and topping with some large washed stones
Plant maintenance is required twice per year to ensure an attractive feature. Because the plants live in pond water, which has a constantly replenishing source of plant feeding nutrients, they can easily become overgrown and unsightly unless contained.
Each autumn you should remove any dead or dying foliage so that it does not drop off and rot which would pollute the water and reeds should be cut down to around four inches above water level. If you have oxygenating plants, which have become overwhelming simple pull out any excess.
Then in the spring you should remove each basket and thin as necessary. If the fine roots have penetrated the baskets sidewalls remove them by cutting them back to the basket with a normal but clean handsaw. Any plants that have overgrown their basket need to be divided and re-potted.