• 11:57 am What Are The Perfect Conditions to Make or Keep Fish Healthy?
  • 11:55 am Old Dog Tremors – Is it Normal For My Dog’s Leg To Tremor?
  • 3:37 pm Necropsy Video
  • 1:35 pm Hand Sanitizer? No I Like Ethanol Spray Better
  • 1:16 pm Why I Don’t Like Gloves For Contagion-Containment-Avoidance
  • 11:54 am Praziquantel Doesn’t Work Anymore Against Flukes?

Resources From March 2020 Presentations at Garden State Koi


The first download is the presentation for the hour on “Important Water Quality Issues” in which I do give some time to the nitrogen cycle and pH – – but spend the most of the time talking about the clinical significance of “hazes” and their cure, oxygen versus carbon dioxide, bioseeding, constant water replacement, how to measure nitrogen to best effect, crowding as a water quality parameter with room for questions.

The second and third download, below, are the wet lab, they’re in full color and are also available in an online-readable e-book also in full color.

  1. Wetlab_2020 PDF
  2. Second Wetlab Download.PDF (The one I lectured from)


Online E-Books

Read them online:

  1. https://www.drjohnson.com/wetlab/mobile/index.html
  2. https://drjohnson.com/wetlab2
  3. https://drjohnson.com/waterquality2020/mobile/index.html

class wet lab blueridgekoi

class wet lab blueridgekoi

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Dr Erik Johnson

Dr Erik Johnson is a Marietta, Georgia Veterinarian with a practice in small animal medicine. He graduated from University of Georgia with his Doctorate in 1991. Dr Johnson is the author of several texts on Koi and Pond Fish Health and Disease as well as numerous articles on dog and cat health topics.