Back to Homepage: Koivet.comFor Mailorder of your Koi and Pond Pet Health Needs Product Testing and Discussion Dr Erik JohnsonA gentle introduction to ecosystem ponds with Dr. Erik JohnsonDrJohnson.com Koi Pond Fish Health Dr Erik JohnsonKoi Pond Fish Health Dr. Erik Johnson on YouTubeKoi Pond Fish Health Vet Dr. Erik JohnsonKoi Health & Disease: Everything You Need To Know 2nd Edition

Other Resources
Outbound Links



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? Koifoods.com

The basics of PH

pH in basic terms
Written by Dr. Johnson

pH in the most basic terms - by Doc Johnson
Simple drop type test with Bromthymol Blue

Stay above pH 7.0 for best results with Koi

pH can "crash" to 5.5 overnight due to fish, plant and bacterial activity without adequate buffering of water - fatalities result
Baking Soda is a good buffer. Check Total Alkalinity before its use, though. (Use one teaspoon per ten gallons if the TA <100)
pH is a measurement of the free hydrogen ions in the system.
pH is measured on a scale of 1 to 14, but the pH required for life lies between 5.5 and 8.5.
Individual species will have varying demands as far as pH. Ignorance of the requirements of each species will result in the death of the animal in question.
pH impacts fish in several ways.
First, if the pH is too low, a condition within the fish called "Acidosis" results.
Symptoms are anorexia, and then production of excess slime, isolation, and resting on the bottom, finally, streaking of the fins, and death will occur.
If the pH is too high, the fish will produce excess slime, and will gasp at the surface. Losses can be major. "Alkalosis" is hard to reverse once it occurs.
On the other hand, Acidosis is rapidly corrected once the pH is brought up to a suitable range.
IMPORTANT: pH contributes to the toxicity of Ammonia.
At higher pH values, ammonia is more toxic.
Below pH 7.2 most Ammonia is ionized to "Ammonium" and is far less toxic.

PondCrisis.com
If you have a koi, pond or fish problem, this site takes you through twenty easy questions and at the end you know what you need to fix in your pond to create restored Koi health.

This has relevance if you are considering raising the pH in a system with accumulating ammonias.
There is a routine, inexpensive test that measures pH, and compares the result to a color chart for the diagnosis.
pH is prone to "fall" in un-buffered systems, and can fall precipitously due to Oxygen consumption, accumulation of Carbon dioxide, decay of fish and other wastes, and the normal activity of nitrifying bacteria which reduce Ammonia to Nitrite.
"Crashes" from a normal pH all the way down to pH 5.5 can occur overnight. At 5.5 the filter bacteria that may have contributed to the crash will shut down, preventing the crash from dropping yet further.
In systems where the pH has been chemically stabilized by any of the commercial buffers, the pH crash phenomena is not commonly seen.
When "pH Crash" is observed, bring up the pH **rapidly**, not slowly. Would you want to be removed from a smoke-filled room rapidly or slowly?
"There are two other articles on Ph in this web site and even more in the book." Doc Johnson






Subscribe to our mailing list

*Indicates Required Field


HELP! Sick Fish!
Twenty Steps to fish health. You LITERALLY can solve almost any Koi or Pond health outbreak with these twenty diagnostic steps and nothing's hard. But it's not "here's your pill" either. Downloads are available.
DrJohnson.com
More than koi health, this site spans all things animal, by a real veterinarian who shoots you straight.

Fishdoc.co.uk
By Frank Prince-Iles. A UK authority who put this site together some time ago and which is still relied upon as a major source of good Koi and pond fish information

If you need pet information AND Koi pondfish and pond information you might like DrJohnson.com which has everything from pet info, to vet info, to koi and pond fish. It has it ALL! Pet Information.

© 2017 all rights reserved koivet.com (drjohnson.com)