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I have a 2,400 gallon koi pond with very large biological filter could probably support a 10,000 gallon pond. Each week my pond looses slightly less...

🧵URGENT: Koi Showing Stress, One-Sided Gill Breathing, Sitting at Bottom — Need Advice 🐟 Hello Koiphen Community, I'm reaching out after a very...

Hi all, I'm very new to the koi hobby but have been doing tons of research. Before doing said research, I bought a few small koi (4-8" tosai) and put...

Hello friends: Once I visited a koi hobbyist who had perfect carpet algae in his pond. It looked like newly mewed lawn, and it was about 5 cm...

He is my most aggressive male, April 16th I moved 8-9 koi about a dozen Sarassa comets into the enlarged 5200 gallon pond. I don’t think I even...

Hi everyone, I need help urgently. One of my koi (approx. 12 inches) is showing clamped pectoral fin most of the time. Sometimes it opens the fin...

My hydrosieve has been working great since I got it 6 yrs ago. I asked someone to maintain the pond for me while I went on a vacation. I just came...

Hi everyone, IÂ’m hoping to get some advice from the community here. I have a koi pond of about 3,000 gallons thatÂ’s been running for 8 years....

A while back, a friend told me this public park in Tulsa had koi. I dropped by today and walked down to the big pond and there was a deck out to the...

Very odd behavior I’ve never seen. I’ve been staring at fish for 20+ years… This same little one was nibbling on a larger koi’s fan tail earlier...

This is June 2025 Newsletter http://www.inlandkoisociety.org/Newsletters/06-2025IKSNewsletter.pdf

Videos: Showa at one year. Pictures: Showa at two year.

Hi Everyone, My koi fry are less than a week old and there are hundreds of them!!! Some egg clusters began to have wispy cotton like covering a...

Neighbor called me,I was wondering I am away from my house 750 miles away. My hose broke on my filter for my pond it’s about 400 gallons. I have no...

I read it on the internet so must be true! When adding new koi does it make sense to also add salt to your pond? And if so how much? 6,500...

I'm hoping someone can help figure out what's going on with this koi's left pectoral fin. The cartilage looks wrinkled and it's either shrinking or...

Hey guys I picked these to up that were a surrendered ad and addition to my koi pond and I have them quarentined and they developed these white spots...

Is my goldfish egg bound? Should I do anything? If so, what? Thank you for any response!

Hi all, My koi and a few carp had anchor worms and I had a bad ammonia spike. Some fish showed signs like breathing from one gill and a few sadly...

Hello, Just for some background, I inherited a pond when I bought my house and have been struggling with it in the summers every year. It’s not a...

This is disheartening to see all of the cool ponding products in the UK and no one wants to ship to the US. From electrical boxes, so now wanting an...

I finished feeding him Erythromycin & Doxycycline food Friday, I was feeling really good about his condition, his original marks were 95% better he...