Nishikigoi Wakimizu Bakki Shower

The Nishikigoi Wakimizu Bakki Shower brings the classic Japanese trickle-tower to your koi pond. Wakimizu means "koi spring water" in Japanese, and that is exactly what a Bakki shower delivers: pond water is pumped to the top tray and cascades down through stacked trays of filter media in open air, super-oxygenating the water, gassing off carbon dioxide and other dissolved wastes, and giving beneficial bacteria an oxygen-rich home. The result is the pure, clear, spring-like water Japanese breeders are famous for.

Choose Polypropylene for a heavy-duty build that lasts for years, or 316 Stainless Steel for a premium commercial-grade shower. Inlet unions mount on the back side for easy hookup and a very clean installation, and support grids in the bottom tray keep media off the outlet for better flow and dispersion. Five widths run from the 15-inch unit, sized for small ponds and quarantine setups, to the 80-inch unit for large ponds and high fish loads. Each is available with your choice of a waterfall or pipe outlet.

Why a Bakki Shower

• Maximum gas exchange. Water falling through open-air trays picks up oxygen and sheds carbon dioxide far better than any submerged filter.
• Biological powerhouse. Media trays stay oxygen-saturated, so nitrifying bacteria work at full speed.
• Rear inlet unions. Two 2-inch connections on the 15, 22, and 40-inch models; three 3-inch on the 60-inch; four 3-inch on the 80-inch, all plumbed from the back for a clean look.
• Support grids in the bottom tray keep media away from the outlet for better flow and dispersion.
• Your choice of build and outlet: Polypropylene or Stainless Steel, with a waterfall or pipe outlet, selected at checkout.

Choose Your Size

Filter media is sold separately, so you can load the trays with your preferred Bakki media. See our Wakimizu and Spiral House shower media.

Frequently Asked Questions

What is a Bakki shower?
A trickle-tower filter from Japanese koi keeping. Water is pumped to the top and rains down through stacked trays of media in open air. That maximizes oxygen transfer and off-gassing while giving beneficial bacteria an ideal oxygen-rich environment, which is why Bakki showers are a favorite of serious koi keepers and breeders.

Polypropylene or Stainless Steel?
Both use the same tray design and rear inlet unions. Polypropylene is the heavy-duty, best-value build; 316 Stainless Steel is the premium commercial-grade option. Pick your material from the options above.

Waterfall outlet or pipe outlet?
Your choice, selected at checkout. The waterfall outlet returns water to the pond as an open cascade; the pipe outlet plumbs the return into your existing line.

Which size do I need?
Match the pond-size rating in the table to your pond, and confirm your pump flow does not exceed the model's max flow. The 15-inch unit is also a favorite for quarantine tanks and grow-out systems.

Is media included?
No, media is sold separately so you can load the trays with your preferred Bakki media. See our Wakimizu and Spiral House shower media.

Does it replace my main filter?
On heavily stocked ponds a Bakki shower usually runs alongside mechanical filtration, such as a NishikigoiRDF drum filter or pressure filter. The shower's strength is oxygen-rich biological filtration and degassing.

How does it ship?
By freight. The carrier calls to schedule an appointment, and someone needs to be present to receive it.

Explore More

Shop the full range: Pond Filtration Supplies, Pressurized Bead Filters, and Pond Aeration.

Planning a Bakki shower into a new build or retrofit? Write [email protected] for a hand-sized recommendation and a freight quote.