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The full GC Tek (Grand Champion Technologies) line: AlphaONE, AquaBead and AlphaNANO pressure filters, pre-plumbed WattMizer systems, Zapp Pure and ZapPRO UV, AquaSieve prefilters, ThermaKoi heaters, WunderMax pumps, media and genuine parts. Mystic Koi is an authorized GC Tek dealer.

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48 products

Zapp Pure Ultraviolet Light Replacement Parts - Ultraviolet Replacement Parts at Mystic Koi
GC Tek
GC Tek Zapp Pure UV Replacement Parts Sale priceFrom $12.95
GC Tek AlphaONE pressure filter
GC Tek
GC Tek AlphaONE / AquaBead / AlphaNANO Pressure Filter Sale priceFrom $2,239.95
GC Tek
GC Tek Clear Filter Lid Sale priceFrom $89.95
Pondkeeper Filter - Filter at Mystic Koi
GC Tek
GC Tek PondKeeper Filter Sale priceFrom $1,399.95
GC Tek 2 HP Media Agitator (Blower)
GC Tek
GC Tek 2 HP Media Agitator (Blower) Sale price$339.95
Aqua Sieve Series PreFilter - Pre FIlter at Mystic Koi
GC Tek
GC Tek AquaSieve Solids-Separator Prefilter Sale priceFrom $524.95
GC Tek 2-Way / 3-Way / Check Valves
GC Tek
GC Tek 2-Way / 3-Way / Check Valves Sale priceFrom $59.95
GC Tek Spider Gasket - Filter Replacement Parts at Mystic Koi
GC Tek
GC Tek Multiport Spider Gasket Sale priceFrom $55.95
GC Tek ZapPRO UV Replacement Parts
GC Tek
GC Tek ZapPRO UV Replacement Parts Sale priceFrom $24.50
GC Tek
Water Co Half Union Sale price$25.00
Zapp Pure Ultraviolet Clarifier - Ultraviolet Light at Mystic Koi
GC Tek
GC Tek Zapp Pure High-Intensity UV Clarifier Sale priceFrom $1,499.95
GC Tek
AlphaOne Key handle Assembly Sale price$185.00
GC Tek Media Agitator Spring Check Valves
GC Tek
GC Tek Media Agitator Spring Check Valves Sale priceFrom $94.95
KoiKeeper Pond Filtration System - Pond System at Mystic Koi
GC Tek
GC Tek WattMizer KoiKeeper System Sale priceFrom $4,072.95
Media Agitator Retro Kit - Media Agitator at Mystic Koi
GC Tek
GC Tek Media Agitator Retro Kit Sale price$529.95
PoliGlass Bead Polishing Filter - Filter at Mystic Koi
GC Tek
GC Tek PoliGlassBead Polishing Filter Sale priceFrom $4,099.95
GC Tek AlphaONE MegaSystem3 — All 3" Complete System
GC Tek
GC Tek AlphaONE MegaSystem3 — All 3" Complete System Sale price$9,272.60
GC Tek TheLiberator PRO System — PLUS PRO with Automatic Backwash
GC Tek
GC Tek TheLiberator PRO System — PLUS PRO with Automatic Backwash Sale priceFrom $10,036.95
GC Tek
GC Tek ElekTrik Pole Control Center Sale price$614.95
GC Tek BioMotion BioVerter Fluidized-Bed Filter
GC Tek
GC Tek BioMotion BioVerter Fluidized-Bed Filter Sale priceFrom $1,644.95
GC Tek
GC Tek NishikigoiPROducts Paddle-Wheel Flow Meter Sale priceFrom $257.95
GC Tek
GC Tek NishikigoiAIR Premium Air Pump Sale priceFrom $239.95
GC Tek
GC Tek Nishikigoi Shower Media — Wakimizu & SpiralHouse Sale priceFrom $158.95
GC Tek Nishikigoi Wakimizu Bakki Shower
GC Tek
GC Tek Nishikigoi Wakimizu Bakki Shower Sale priceFrom $920.00
GC Tek NishikigoiRDF Rotating Drum Filter
GC Tek
GC Tek NishikigoiRDF Rotating Drum Filter Sale priceFrom $995.00
GC Tek NishikigoiUV Vertical Amalgam UV — 316 Stainless
GC Tek
GC Tek NishikigoiUV Vertical Amalgam UV — 316 Stainless Sale priceFrom $834.95
GC Tek NishikigoiUV Horizontal Amalgam UV — 316 Stainless
GC Tek
GC Tek NishikigoiUV Horizontal Amalgam UV — 316 Stainless Sale priceFrom $749.95
GC Tek WattMizer PLUS PRO System
GC Tek
GC Tek WattMizer PLUS PRO System Sale priceFrom $6,241.95
GC Tek WattMizer PLUS System
GC Tek
GC Tek WattMizer PLUS System Sale priceFrom $4,999.95
GC Tek KoiExerciser Eductor Tree
GC Tek
GC Tek KoiExerciser Eductor Tree Sale price$524.95
GC Tek
GC Tek Filter Tank Parts — Sludge Drains & Top Caps Sale priceFrom $38.95
GC Tek WunderMax Variable Speed Pump
GC Tek
GC Tek WunderMax Variable Speed Pump Sale priceFrom $1,895.00
GC Tek
GC Tek Unions, Sweeps & Gauges Sale priceFrom $12.85
GC Tek
GC Tek ThermaKoi ZappHeat Inline Pond Heater Sale priceFrom $1,469.95
GC Tek AquaSieve2 Replacement Parts
GC Tek
GC Tek AquaSieve2 Replacement Parts Sale priceFrom $13.95
GC Tek MultiCyclone 50 Centrifugal Prefilter
GC Tek
GC Tek MultiCyclone 50 Centrifugal Prefilter Sale price$499.95
GC Tek X2 Pressure Filter (formerly Medusa)
GC Tek
GC Tek X2 Pressure Filter (formerly Medusa) Sale priceFrom $3,837.95
GC Tek Multiport Valve & Repair Kit
GC Tek
GC Tek Multiport Valve & Repair Kit Sale priceFrom $259.95
GC Tek Filter Media — BioGems / AlphaBioONE / AlphaNANO
GC Tek
GC Tek Filter Media — BioGems / AlphaBioONE / AlphaNANO Sale priceFrom $40.95
GC Tek
AlphaBio2 Sinking Media Sale price$149.95
GC Tek
GCTek Black Multi-Port Union Sale price$15.00
GC Tek
AB 1.5 HP Blower Sale price$279.95
Pondkeeper Filtration System - Pond System at Mystic Koi
GC Tek
GC Tek PondKeeper Complete System Sale priceFrom $3,186.95
AlphaOne 3" Port Mega Filters - Filter at Mystic Koi
GC Tek
GC Tek 6.3 / 10.3 Pressure Filter — 3" Ports Sale priceFrom $4,099.95
The Liberator Auto Back-Wash Cleaning System - Filter at Mystic Koi
GC Tek
GC Tek TheLiberator Automatic Backwash System Sale priceFrom $3,795.00
Zap Pro 116 HO Ultraviolet Light - Ultraviolet Light at Mystic Koi
GC Tek
GC Tek ZapPRO 116 W HO Dual-Lamp UV Sale price$1,495.00
Uniclear Filter - Filter at Mystic Koi
GC Tek
GC Tek UniClear Carbon Polishing Filter Sale priceFrom $1,424.95