Controllers and Testing

Showing all 140 results

HYDROS – Klir Drive Port Adapter
Rated 4.00 out of 5
$13.99
Add to cart
Neptune Systems – Apex to Varios (Y Cable)
Rated 4.67 out of 5
$17.99
Out of Stock
HYDROS – ATO Kit
Rated 4.67 out of 5
$79.99
Out of Stock
Neptune Systems – Apex Temperature Probe
Rated 4.67 out of 5
$32.99
Add to cart
API – Nitrite Test Kit
Rated 4.67 out of 5
$12.99
Add to cart
Hanna Instruments – pH Calibration Solution
Rated 5.00 out of 5
$1.99
Add to cart
$84 OFF
Neptune Systems – Apex EL
Rated 4.33 out of 5
$475.99
Add to cart
HYDROS – Leak Sensor
Rated 5.00 out of 5
$39.99
Add to cart
HYDROS – Control X3 Starter Pack
Rated 4.67 out of 5
$299.99
Add to cart
HYDROS – WaveEngine V2
Rated 4.67 out of 5
$299.99
Add to cart
Salifert – Copper Test Kit
Rated 4.00 out of 5
$21.99
Add to cart
Red Sea – Foundation Pro Test Kit
Rated 4.33 out of 5
$59.99
Out of Stock
HYDROS – Command Bus Terminator
Rated 4.33 out of 5
$4.99
Out of Stock
Neptune Systems – Apex DDR Dual Reservoir
Rated 4.67 out of 5
$204.99
Add to cart
Neptune Systems – Apex WAV Starter Kit
Rated 4.67 out of 5
$479.99
Add to cart
Hanna Instruments – Alkalinity
Rated 5.00 out of 5
$9.99 – $59.99
Add to cart
Neptune Systems – Apex WAV Single Pump
Rated 4.67 out of 5
$184.99
Add to cart
Red Sea – Marine Care Multi Test Kit
Rated 4.67 out of 5
$69.99
Add to cart
HYDROS – Control XS
Rated 4.67 out of 5
$159.99
Add to cart
HYDROS – Maxspect Gyre 150/250/280 WaveEngine Adapter
Rated 4.67 out of 5
$11.99
Out of Stock
Red Sea – Phosphate Pro Test Kit
Rated 4.67 out of 5
$49.99
Out of Stock
Fauna Marin – Saltwater Multi Reference Solution
Rated 5.00 out of 5
$19.99
Add to cart
HYDROS – Float Switch
Rated 5.00 out of 5
$14.99
Add to cart
Hanna Instruments – Nitrate Low Range
Rated 4.33 out of 5
$4.99 – $59.99
Add to cart
Neptune Systems – Apex VDM Module
Rated 4.67 out of 5
$104.99
Out of Stock
NEPTUNE SYSTEMS – Double Junction Lab Grade PH Probe
$89.99
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NEPTUNE SYSTEMS – Double Juction ORP Probe Lab Grade
$99.99
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Neptune Systems – Sky Light
Rated 4.67 out of 5
$869.99
Out of Stock
Apex A3 Liquid Level Sensor
$44.99 – $79.99
Add to cart
Neptune Systems – Apex Optical Sensor
Rated 4.33 out of 5
$32.99
Out of Stock
Salifert – pH Test Kit
Rated 5.00 out of 5
$21.99
Add to cart
Hanna Instruments – Marine Salinity Tester
Rated 4.50 out of 5
$74.99
Add to cart
HYDROS – Automatic Feeder
Rated 4.67 out of 5
$34.99
Out of Stock
HYDROS – Dual Inline TDS Sensor
Rated 4.67 out of 5
$49.99
Out of Stock
EcoTech Marine – Versa Dosing Pump Single Head
Rated 4.67 out of 5
$199.99
Add to cart
Hanna Instruments – Ultra-Low Range Phosphorus (PPB)
Rated 5.00 out of 5
$9.99 – $59.99
Add to cart
HYDROS – Skimmer Sensor
Rated 5.00 out of 5
$39.99
Add to cart
Red Sea – KH / Alkalinity Pro Test Kit
Rated 4.33 out of 5
$39.99
Add to cart
HYDROS – Control X4 (Controller Only)
Rated 4.67 out of 5
$349.99
Out of Stock
Neptune Systems – Apex DOS Multi-Purpose Dosing & Fluid Metering System
Rated 4.67 out of 5
$329.99
Add to cart
Salifert – Magnesium Test Kit
Rated 5.00 out of 5
$21.99
Add to cart
Neptune Systems – Apex Practical Multi-Purpose Utility Pmup V2
Rated 5.00 out of 5
$44.99
Add to cart
Neptune Systems – Apex (AFS) Automatic Feeding System
Rated 4.33 out of 5
$109.99
Add to cart
Neptune Systems – Apex Lunar Simulator Module
Rated 4.67 out of 5
$69.99
Out of Stock
Neptune Systems – Trident
Rated 4.67 out of 5
$639.99
Add to cart
ICP Single Kit
Rated 4.00 out of 5
$29.95
Add to cart
Neptune Systems – Apex PAR Monitoring Kit
Rated 4.33 out of 5
$324.99
Add to cart
HYDROS – Reef Octopus Varios/Octo Pulse WaveEngine Adapter
Rated 4.67 out of 5
$11.99
Out of Stock
API – Alkalinty Test Kit
Rated 4.67 out of 5
$12.99
Add to cart
HYDROS – Drive Port 9′ Extension Cable
Rated 4.00 out of 5
$9.99
Out of Stock
API – Saltwater Master Test Kit
Rated 4.67 out of 5
$34.99
Out of Stock
Neptune Systems – Apex Automatic Top-Off Kit V2
Rated 4.67 out of 5
$224.99
Add to cart
Neptune Systems – Apex DOS Replacment Head
Rated 4.33 out of 5
$34.99
Out of Stock
HYDROS – Rope Leak Sensor Kit
Rated 4.67 out of 5
$39.99
Out of Stock
Neptune Systems – Apex FS-50 1/2″ Flow Sensor
Rated 4.33 out of 5
$32.99
Out of Stock
Hanna Instruments – Marine Master
Rated 5.00 out of 5
$399.99
Add to cart
Neptune Systems – 12 Volt Apex Power Supply
Rated 4.67 out of 5
$17.99
Add to cart
Neptune Systems – Apex COR15 Pump
Rated 4.67 out of 5
$319.99
Add to cart
NEPTUNE SYSTEMS – Apex A3 Pro System
$899.99
Add to cart
VCA – SPS Kit for Apex Conductivity
Rated 5.00 out of 5
$27.99
Add to cart
Red Sea – Calcium Pro Test Kit
Rated 4.67 out of 5
$39.99
Add to cart
Copper reagent 25
Rated 5.00 out of 5
$9.99
Add to cart
$Top Shelf Aquatics Hanna Instruments – Digital Refractometer$
Hanna Instruments – Digital Refractometer
Rated 4.33 out of 5
$189.99
Out of Stock
Seachem – Ammonia Alert
Rated 4.33 out of 5
$11.99
Out of Stock
$110 OFF
NEPTUNE SYSTEMS – Value Release APEX
$619.99
Add to cart
Neptune Systems – Apex FMK Flow Monitoring Kit
Rated 4.33 out of 5
$209.99
Add to cart
Salifert – Nitrate Test Kit
Rated 4.67 out of 5
$21.99
Add to cart
HYDROS – Control X3 Monitor Pack
Rated 5.00 out of 5
$299.99
Add to cart
Hanna Instruments – PH Storage Solution
Rated 4.67 out of 5
$11.99
Add to cart
Neptune Systems – Apex Lunar LED String 3 LEDs
Rated 4.67 out of 5
$44.99
Out of Stock
Red Sea – Algea Control Pro Test Kit
Rated 4.67 out of 5
$59.99
Add to cart
HYDROS – WaveEngine LE
Rated 4.67 out of 5
$199.99
Out of Stock
Fauna Marin – Salinity Reference Solution
Rated 5.00 out of 5
$6.99
Add to cart
HYDROS – Maxspect Gyre 330/350 WaveEngine Adapter
Rated 4.67 out of 5
$11.99
Out of Stock
Neptune Systems – Apex Lunar LED String 5 LEDs
Rated 4.00 out of 5
$64.99
Out of Stock
API – Nitrate Test Kit
Rated 4.67 out of 5
$12.99
Add to cart
Alkatronic
Rated 4.67 out of 5
$999.99
Out of Stock
Neptune Systems – Trident Reagent 6 month supply
Rated 4.33 out of 5
$104.99
Add to cart
HYDROS – 4 Outlet WIFI Power Strip
Rated 4.67 out of 5
$39.99
Add to cart
API – High Range pH Test Kit
Rated 4.33 out of 5
$12.99
Add to cart
NEPTUNE SYSTEMS – Apex A3 System
$599.99
Add to cart
Hanna Instruments – Checktemp With Stainless Steel Probe
Rated 4.50 out of 5
$39.99
Out of Stock
HYDROS – Control XP8 Pro Energy Bar
Rated 4.67 out of 5
$279.99
Add to cart
Apex Brain Upgrade
Rated 4.67 out of 5
$399.99
Out of Stock
HYDROS – Control XS Starter Pack
Rated 5.00 out of 5
$199.99
Add to cart
NEPTUNE SYSTEMS – Advanced Leak Detection Solid Surface Probe
$32.99
Add to cart
HYDROS – Control X2 Starter Kit
Rated 5.00 out of 5
$199.99
Out of Stock
Hanna Instruments – Cuvettes Pair
Rated 4.67 out of 5
$8.99
Add to cart
API – Calcium Test Kit
Rated 4.67 out of 5
$12.99
Add to cart
HYDROS – 6ft System Command Bus Cable
Rated 4.33 out of 5
$9.99
Add to cart
HYDROS – Control X4 Pro Pack
Rated 4.00 out of 5
$659.99
Out of Stock
HYDROS – Command Bus 50′ Data Only Cable
Rated 4.67 out of 5
$35.99
Out of Stock
HYDROS – IceCap Gyre 1K/2K/3K/4K WaveEngine Adapter
Rated 4.33 out of 5
$11.99
Out of Stock
HYDROS – Wave Engine Ecotech Compatible
Rated 5.00 out of 5
$349.99
Out of Stock
HYDROS – Maxspect Gyre XF280 WaveEngine Adapter
Rated 4.33 out of 5
$11.99
Out of Stock
Hanna Instruments – Salinity Calibration
Rated 5.00 out of 5
$1.99
Add to cart
HYDROS – Control X2 (Controller Only)
Rated 4.00 out of 5
$159.99
Out of Stock
API – Copper Test Kit
Rated 4.67 out of 5
$12.99
Out of Stock
Hanna Instruments – Ultra-Low Range Phosphate (PPM)
Rated 5.00 out of 5
$9.99 – $59.99
Add to cart
HYDROS – Sense Port 9′ Extension Cable
Rated 4.67 out of 5
$9.99
Out of Stock
Neptune Systems – Apex Display Module
Rated 4.67 out of 5
$109.99
Add to cart
Neptune Systems – Apex COR20 Pump
Rated 4.33 out of 5
$374.99
Add to cart
HYDROS – Temperature Probe
Rated 4.00 out of 5
$24.99
Add to cart
API – Reef Master Test Kit
Rated 4.67 out of 5
$34.99
Add to cart
Salifert – Phosphate Test Kit
Rated 4.67 out of 5
$21.99
Add to cart
Neptune Systems – Apex Magnetic Probe Holder
Rated 4.67 out of 5
$44.99
Add to cart
HYDROS – Control X4 Starter Pack
Rated 4.33 out of 5
$449.99
Out of Stock
AquaTop – Titanium Heater
Rated 5.00 out of 5
$79.99 – $109.99
Add to cart
Red Sea – Magnesium Pro Test Kit
Rated 4.67 out of 5
$39.99
Add to cart
Salifert – Nitrite Test Kit
Rated 4.33 out of 5
$21.99
Add to cart
NEPTUNE SYSTEMS – Lab Grade Conductivity Probe
$199.99
Add to cart
HYDROS – WaveEngine APX Link
Rated 4.67 out of 5
$12.99
Out of Stock
Red Sea – Magnesium Pro Test Refill
Rated 4.33 out of 5
$22.99
Add to cart
Salifert – Calcium Test Kit
Rated 4.67 out of 5
$21.99
Add to cart
Salifert – Strontium Test Kit
Rated 4.33 out of 5
$34.99
Out of Stock
HYDROS to Pump Adapter – Gyre XF330/XF350
Rated 4.67 out of 5
$11.99
Out of Stock
Hanna Instruments – High Range Nitrate
Rated 5.00 out of 5
$14.99 – $59.99
Add to cart
NEPTUNE SYSTEMS – Optical Multi-Surface Leak Sensor
$39.99
Add to cart
Neptune Systems – Energy Bar EB832
Rated 4.67 out of 5
$289.99
Add to cart
HYDROS – Water Level Sensor
Rated 4.50 out of 5
$39.99
Out of Stock
Hanna Instruments – pH Tester
Rated 5.00 out of 5
$39.99
Out of Stock
Salifert – Flatworm eXit
Rated 4.67 out of 5
$18.99
Add to cart
Hanna Instruments – Copper High Range
Rated 5.00 out of 5
$59.99
Add to cart
API – Ammonia Test Kit
Rated 4.33 out of 5
$12.99
Out of Stock
AquaTop – Nano Heater 25 Watt
Rated 4.67 out of 5
$24.99
Out of Stock
HYDROS – Rope Leak Cable Extension
Rated 4.67 out of 5
$29.99
Out of Stock
Neptune Systems – Apex 1LINK Power & Communication Module
Rated 4.67 out of 5
$159.99
Add to cart
HYDROS – Dosing Pump
Rated 4.00 out of 5
$59.99
Add to cart
HYDROS – Temp Sensor
Rated 4.33 out of 5
$24.99
Add to cart
NEPTUNE SYSTEMS – A3 Jr System
$299.99
Add to cart
Neptune Systems – Apex WXM Module
Rated 4.00 out of 5
$124.99
Out of Stock
EcoTech Marine – Versa Dosing Pump Four Head
Rated 4.33 out of 5
$799.99
Add to cart
HYDROS – DC Solenoid Valve
Rated 4.67 out of 5
$24.99
Add to cart
HYDROS – Control X3 Pro Pack
Rated 4.67 out of 5
$539.99
Out of Stock
Salifert – Alkalinity Test Kit
Rated 4.67 out of 5
$21.99
Add to cart
Neptune Systems – Apex I/O Breakout Box
Rated 4.00 out of 5
$44.99
Add to cart
Neptune Systems – Trident Reagent 2 month supply
Rated 4.67 out of 5
$49.99
Add to cart
API – Phosphate Test Kit
Rated 4.33 out of 5
$12.99
Add to cart
Neptune Systems – Apex FS-25 1/4″ Flow Sensor
Rated 4.67 out of 5
$32.99
Add to cart
HYDROS – Smart Wifi Plug
Rated 4.33 out of 5
$23.99
Out of Stock

HYDROS – Klir Drive Port Adapter

Neptune Systems – Apex to Varios (Y Cable)

HYDROS – ATO Kit

Neptune Systems – Apex Temperature Probe

API – Nitrite Test Kit

Hanna Instruments – pH Calibration Solution

Neptune Systems – Apex EL

HYDROS – Leak Sensor

HYDROS – Control X3 Starter Pack

HYDROS – WaveEngine V2

Salifert – Copper Test Kit

Red Sea – Foundation Pro Test Kit

HYDROS – Command Bus Terminator

Neptune Systems – Apex DDR Dual Reservoir

Neptune Systems – Apex WAV Starter Kit

Hanna Instruments – Alkalinity

Neptune Systems – Apex WAV Single Pump

Red Sea – Marine Care Multi Test Kit

HYDROS – Control XS

HYDROS – Maxspect Gyre 150/250/280 WaveEngine Adapter

Red Sea – Phosphate Pro Test Kit

Fauna Marin – Saltwater Multi Reference Solution

HYDROS – Float Switch

Hanna Instruments – Nitrate Low Range

Neptune Systems – Apex VDM Module

NEPTUNE SYSTEMS – Double Junction Lab Grade PH Probe

NEPTUNE SYSTEMS – Double Juction ORP Probe Lab Grade

Neptune Systems – Sky Light

Apex A3 Liquid Level Sensor

Neptune Systems – Apex Optical Sensor

Salifert – pH Test Kit

Hanna Instruments – Marine Salinity Tester

HYDROS – Automatic Feeder

HYDROS – Dual Inline TDS Sensor

EcoTech Marine – Versa Dosing Pump Single Head

Hanna Instruments – Ultra-Low Range Phosphorus (PPB)

HYDROS – Skimmer Sensor

Red Sea – KH / Alkalinity Pro Test Kit

HYDROS – Control X4 (Controller Only)

Neptune Systems – Apex DOS Multi-Purpose Dosing & Fluid Metering System

Salifert – Magnesium Test Kit

Neptune Systems – Apex Practical Multi-Purpose Utility Pmup V2

Neptune Systems – Apex (AFS) Automatic Feeding System

Neptune Systems – Apex Lunar Simulator Module

Neptune Systems – Trident

ICP Single Kit

Neptune Systems – Apex PAR Monitoring Kit

HYDROS – Reef Octopus Varios/Octo Pulse WaveEngine Adapter

API – Alkalinty Test Kit

HYDROS – Drive Port 9′ Extension Cable

API – Saltwater Master Test Kit

Neptune Systems – Apex Automatic Top-Off Kit V2

Neptune Systems – Apex DOS Replacment Head

HYDROS – Rope Leak Sensor Kit

Neptune Systems – Apex FS-50 1/2″ Flow Sensor

Hanna Instruments – Marine Master

Neptune Systems – 12 Volt Apex Power Supply

Neptune Systems – Apex COR15 Pump

NEPTUNE SYSTEMS – Apex A3 Pro System

VCA – SPS Kit for Apex Conductivity

Red Sea – Calcium Pro Test Kit

Copper reagent 25

Hanna Instruments – Digital Refractometer

Seachem – Ammonia Alert

NEPTUNE SYSTEMS – Value Release APEX

Neptune Systems – Apex FMK Flow Monitoring Kit

Salifert – Nitrate Test Kit

HYDROS – Control X3 Monitor Pack

Hanna Instruments – PH Storage Solution

Neptune Systems – Apex Lunar LED String 3 LEDs

Red Sea – Algea Control Pro Test Kit

HYDROS – WaveEngine LE

Fauna Marin – Salinity Reference Solution

HYDROS – Maxspect Gyre 330/350 WaveEngine Adapter

Neptune Systems – Apex Lunar LED String 5 LEDs

API – Nitrate Test Kit

Alkatronic

Neptune Systems – Trident Reagent 6 month supply

HYDROS – 4 Outlet WIFI Power Strip

API – High Range pH Test Kit