Choosing the Right Size Filter for Your Pond

In order to keep your pond clean, you need the proper size filter. Follow these instructions to find the filter size you need for your pond.

You first need to figure the volume of the pond. The formula for this is:
Average Length (feet) x Average Width (feet) x Average Depth (feet) = feet³ THEN
feet³ x 6.23 = volume in gallons

You will need to make adjustments to the pond volume if you are dealing with a very shallow pond or if it is in full sunlight. If your pond has an average depth of 2 feet or less OR if it is in full sunlight, you need to add 25% to the pond volume. The formula is:

Pond volume in gallons x 1.25 = pond volume for filter shopping purposes

If your pond has an average depth of 2 feet or less AND is in direct sunlight, add 50% to the pond volume. The formula for this is:

Pond volume in gallons x 1.50 = pond volume for filter shopping purposes

Now that you have the volume of your pond figured out, you need to figure your pond filter size. The entire volume of your pond should pass through the filter at least once every three hours. If you are looking for a very clear pond, the entire pond should pass through once every two hours. The formula for this calculation is:

Volume / 3 (maximum hours for full pond filtration) = GPH (gallons per hour) filter size you need. This is the MINIMUM filter size you need.

Volume / 2 (number of hours for a very clear pond) = GPH filter size for a clear pond. This is the MAXIMUM filter size you need.

Because pond filters come in standard sizes, you might have to find a filter that is somewhere between the minimum and maximum filter size you figured.

EXAMPLE
Volume 6 feet long x 4 feet wide x 3 feet deep = 72 THEN 72 x 6.23 = 449 gallons
Pond in full sunlight 449 gallons x 1.25 = 561 gallons
Filter size MINIMUM 561 / 3 = 187 GPH
Filter size MAXIMUM 561 / 2 = 281 GPH

The acceptable filter size for this pond is between 187 and 281 gallons per hour.

Other online sites:

Buckwheat neck pillows Now you can use all natural buckwheat to help alleviate your neck pain. The buckwheat pillow easily conforms to your necks position.

Dog and pet purse carriers Be seen with one of the most stylish accessories - the dog purse carrier. These types of carriers for your dog come in a wide variety of sizes and designs.

Empty popcorn tin Many people collect pop corn tins for their decorative look. You can even use them to create your own gift tins for birthdays and other special occasions.

Spun glass figurine Browse around this site for great buys on a variety of spun glass figurines.

New digital kitchen scales Kitchen scales are very accurate and many homeowners will use them for more than just weighing food.

Decorative fireplace screens The decorative screen for fireplaces are great for just about any type of fireplace set up.

Front door knockers To create a strong feel to your front door choose door knockers that are heavy. They also make it easy for you to hear someone knocking at the front door.

Best double doormats Keep your entry way clean with the use of a double door mat. The double door mat is used to help keep the mud and dirt on the outside of your house rather than the inside.

Gas fireplace logs Today you can buy many different kinds of realistic fireplace logs for your gas fireplace logs. They are made to look like the real thing. Sometimes the only thing that will give it away is the consistent flame.

Solid wood patio furniture Wood patio furniture has a great look to it and it even feels good when you are sitting in it. Solid wood furniture easily matches any outdoor decor.

New cedar garden furniture The look and smell of cedar furniture will put anybody in a good mood. Cedar wood furniture will not need as much care as other woods but you should still put it away in the winter.

Home and backyard guides:
Pond and backyard recreation
Water play for people
Landscape design around your pond
Types of furniture and benches for your pond area
Backyard play area

Home: Find Pond Filters

Types of filters

Choosing a filter

Maintenance & care

All filter information

Where to buy pond filters

Contact & Terms Use