Koi, Goldfish & Pond Health In Twenty Steps
Koi, Goldfish & Pond Health In 20 Steps
Ulcer Treatments
Parasite Treatments & Cures
Koi Water Quality
Koi Quarantine & Health

Is It Crowding?

Keywords: Crowding - How Many Koi or Goldfish For the Pond or WaterGarden?

Crowding formula for Koi ponds - by Doc Johnson

Calculate the total volume of the system

Here's a formula:

Length (inches) x Depth (inches) x Width (inches) = Product

Divide that product by 231 to give volume.

Or for a cylinder: (Pi) x Radius2 (inches) x Depth (inches) gives a product.

Divide that product by 231 to give volume in gallons.

(Where pi = 3.1416)

Calculate the "inches of fish"

Inventory each fish, or derive an estimate, and add up the total inches of fish.


"One inch of fish per ten gallons of pond water will do well if adequately filtrated and small, regular water changes are done."

What This Means:

Well, this is true for the quarantine and hospital tanks. This is true for retail tanks. This is true, no matter if you believe it or not. Just like the laws of gravity.

"When fish are sick, nothing you do will work until you remedy a crowding scenario. You can reduce the stocking density to the above, or Mother Nature will do it for you."

Then, your treatments will start to work.

We offer FREE personal help with your sick koi and/or koi pond water problems. Just fill out our easy
Help Form by Aqua Meds® and we will give you step by step help to solve your problem.

Fish Medicines
Learn about fish medicines, what they do, and where to get them.

Aqua Meds.com
Have questions about the care of sick fish and/or pond water quality problems and how to treat them? We have the answers.

Koi Crisis has a symptoms chart by system you can choose the symptom by fish part, and resolve a lot of Koi pond fish problems or at least, learn about them understand how to remedy them.

Koi Food & Feeding
What should you feed your koi? How many times per day? Is Corn really that bad in a Koi diet? What are the most common feeding mistakes people make? What's the best food?