I Designed This Koi Filter From Scratch… And It Works! | T.N.J. | EP

In this 100th episode of The Nishikigoi Journal, Ricky shares the full process of building and testing a completely custom pump-fed filtration unit for one of his koi ponds. Designed to maximise biological capacity in a compact space, this unique system combines traditional brush filtration, a fluidised bed, and a trickle tower — all in one.

It’s a return to the hands-on, practical side of koi keeping, blending old-school principles with modern execution. From concept and plumbing to troubleshooting and success, this episode captures the excitement and problem-solving that defined the early days of koi system building.

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📖 CHAPTERS:

0:00 – Introduction & Japan Trip Announcement
0:30 – A New Filtration Project Begins
1:15 – Design Overview & System Purpose
2:00 – Component Breakdown & Functionality
4:30 – Plumbing In & First Installation
6:00 – First Water Test & Initial Issues
7:30 – Fixing Flow Paths & Key Lessons
9:00 – Filter Running & Early Results
11:00 – K1 vs K+ Media Discussion
13:00 – Trickle Tray Performance
15:00 – Polishing Options & Fines Management
17:00 – Multi-Bay Filtration: Still Relevant?
19:00 – Final Tweaks & System Capacity
20:00 – Bonus: Ricky & AJ’s Home Fish Tank Setup
21:30 – Outro & Plans from Japan

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