GC Tek AlphaONE, AquaBead & AlphaNANO Pressure Filters

GC Tek AlphaONE / AquaBead / AlphaNANO Pressure Filter

$2,379.95

Built to order · ships in about 3 weeks · freight delivery

GC Tek assembles this unit at the factory after you order — allow roughly 3 weeks before it ships. It travels by LTL freight; no freight is charged at checkout. We quote the freight to your address and confirm it with you before anything ships. Local pickup in Upland, CA is always free.

GC Tek pressure bead filter · 5 sizes · 3 media · standard or LH valve

The filter 48 out of 50 GC Tek customers choose

One tank family, your choice of media. The AlphaONE, AquaBead and AlphaNANO share the same double-layer fiberglass vessel, Omnifuser internals, 2 HP media agitator, ALISS life-support valve and 10" clear lid — the only difference is what's inside. Pick a size by pond volume and fish load, then pick the media that suits how you keep koi.

Authorized GC Tek dealerGenuine product, factory warranty, distributor-direct.

Warranty & support handled hereWe set up, troubleshoot and handle warranty claims in-house.

Freight confirmed before it shipsYou approve the freight quote first — no surprises at the door.

Omnifuser internals

No slotted laterals, no elbows. Water enters at the lowest point and exits at the highest, so the entire media bed works and solids collect at the bottom center where backwash purges them.

2 HP media agitator

A regenerative blower (100+ CFM) tumbles the bed during backwash so beads never pack or channel — a 3-minute weekly chore instead of a wrestling match.

ALISS life support

Pump failure or medical bypass? Plug your air pump into the ALISS valve and the bacteria stay oxygenated until flow is restored.

Lifetime tank warranty

Molded fiberglass with a second spun-fiberglass shell, pressure rated to 58 psi. Limited lifetime warranty on the tank, 1-year satisfaction guarantee.

Which media?

AlphaONE — AlphaBioONE media

Open-cell, dimpled, air-injected media distributes debris through the whole bed, not the top few inches.
Least flow restriction of the three; doesn't slow down between backwashes the way classic beads do.
The one most koi keepers (and GC Tek) pick — roughly 48 of every 50 filters shipped.

AquaBead — BioGems media | AlphaNANO media

AquaBead: the original small floating bead. Tighter mechanical capture for keepers who want the finest polish from a bead bed and don't mind a slightly higher operating pressure.
AlphaNANO: BioGems-sized pieces molded like AlphaONE's open-cell media — 600+ sq ft of surface per cu ft, field-tested by contractors for over a year. Polishing-filter clarity with AlphaONE-style flow.

Size by pond & fish load

Size	Pond up to	Fish load	Max flow	Tank (dia × H)	Lid	Standard	LH
1.75 cu ft	2,500 gal	90 lb	50 gpm	19" x 31"	8"	$2,239.95	$2,379.95
2.5 cu ft	5,000 gal	125 lb	70 gpm	21" x 34.5"	10"	$2,524.95	$2,669.95
4.25 cu ft	10,000 gal	225 lb	90 gpm	24.5" x 35.5"	10"	$2,824.95	$2,974.95
6.0 cu ft	17,000 gal	300 lb	120 gpm	30.4" x 40"	10"	$3,329.95	$3,559.95
10.0 cu ft	25,000 gal	500 lb	180 gpm	36.4" x 45"	10"	$4,279.95	$4,437.95

GC Tek's sizing rule: 1 cu ft of media supports about 50 lb of koi fed 1% of body weight per day. Serious koi ponds run heavier than a water garden — when you're between sizes, go up. All ports are 2" unions; the 1.75 has an 8" lid, everything larger gets the 10" lid.

Standard vs. LH (Lower Head)

Most of the restriction in any pressurized system is the multiport valve. On the LH version the water bypasses the multiport entirely in normal filtration and only passes through it during backwash, and the internals are reworked for even more flow. Same tank, same media, same ratings — you just get to run a smaller, lower-amp pump for the same turnover. Built for keepers who care about the electric bill.

Every unit ships with

6-position multiport valve (Filter · Backwash · Rinse · Waste · Recirculate · Closed) with 2" union openings and a large cleanable sight glass
2 HP media agitator with heavy-duty rebuildable spring check valve
ALISS air-injection valve · true-reading pressure gauge · EZ Drain that lets water out, not beads
Clear lid · media pre-loaded · back in GC Tek's most popular color: black

Replacement media Multiport valve & repair kit Spider gasket Clear lids Spring check valves Pre-plumbed WattMizer systems All GC Tek

Ordering & delivery

How long until it ships?

Most GC Tek filters and systems are assembled to order in Chandler, Oklahoma. Typical lead time is about 3 weeks from order to ship, then transit time. Parts and media we stock ship from Upland, CA within a day or two.

Why no freight at checkout?

Freight for a pressure filter or pre-plumbed system depends on your address, liftgate needs and residential vs. commercial delivery. Charging a flat guess would overcharge some customers and undercharge others, so we quote it to the dollar and confirm with you before shipping.

Can I pick it up instead?

Yes — pick up free at Mystic Koi & Water Gardens in Upland, CA. Choose local pickup at checkout or tell us in the order notes and we'll skip freight entirely.

Who handles the warranty?

We do. As an authorized GC Tek dealer we process warranty and parts through the factory for you — no shipping the tank back across the country.

GC Tek
Grand Champion Technologies · Chandler, Oklahoma · pond filtration built in the USA

Mystic Koi & Water Gardens — authorized GC Tek dealer, Upland, California.
Questions on sizing? Call the shop and talk to someone who runs these filters.