Aquarium pH Level Meters and Controllers for sale

134 Results

Milwaukee Instruments MC122 Multifunction pH controller
Brand New · Milwaukee
(18)
$99.99
Trending at $123.75
Free shipping
+^IH & Z*2 ] w9.?L!|/ V Z 6$S p o n s o r e d
New ListingHydros Control X4 / XP8 PRO Pack Reef Aquarium Controller Reef Tank OPEN BOX!
Pre-Owned
$639.95
or Best Offer
$12.14 shipping
+^ C8 N&*U TD ] w.1O 6E?!| / $S p o n s o r e d
Customizable Apex Neptune Breakout Box 2x Lighted Toggle Switches Push Terminal
Brand New
$63.74
Was: $74.99was - US $74.99
or Best Offer
Free shipping
26 watching
+SA^ &T* ] R Hw.M ?!B|/D Q$S p o n s o r e d
Customizable Breakout Box 4x Lighted Toggle 2x Push Button for Apex Neptune
Brand New
$80.74
Was: $94.99was - US $94.99
or Best Offer
Free shipping
8 watching
+F^ &U* ] 2wE V.?!D|/ $ 3S p o n s o r e d
New ListingNeptune Systems Apex A2 Energy Bar, Base unit, Probes, Original Box
Pre-Owned · Neptune Systems
$499.99
$10.08 shipping
+^4 &* T] w .K?I 7!B |/BG F$
Neptune Systems Apex Lab Grade Ph And Orp Probe Mfg 2018
Pre-Owned · Neptune Systems
$69.99
Free shipping
9 watching
+^W &*T ] NBw. ZP A?8! |3/9 $
New ListingNeptune Systems Apex Classic Pro Aquarium Controller System (Wifi)
Pre-Owned · Neptune Systems
$580.00
or Best Offer
$17.59 shipping
+GW^ &* VR] w.9?H A!|/N 8Y $
Hydros Control X4 / XP8 PRO Pack Reef Aquarium Controller Reef Tank NIB
Brand New
$699.95
or Best Offer
$12.14 shipping
+CE^ D&* 2] w.O?K!|/ E4 2$
Neptune Systems APEX A3 Pro New Sealed In Box
Brand New · Neptune Systems
$844.99
Free shipping
Y+3 ^ NQ &H*C V E] w .?I!|/P $
Coralvue HYDROS Control X10 Controller & Dosing System New NIB
Brand New
$789.95
or Best Offer
$11.88 shipping
G+^V &* ] w. PT ?K!|B BD/ $
Used Neptune Systems Apex Lab Grade Ph Probe Double Junction
Pre-Owned · Neptune Systems
$49.99
Free shipping
7D +ON^ U6&* ]O5 Q w.?4!|/ $
GHL Profilux 4 Aquarium Controller.
Pre-Owned
$340.00
or Best Offer
Free shipping
6+^ A &* ] DQ 6F 87w .U?!|3 / $
KH Controller
Brand New
$619.00
or Best Offer
$60.00 shipping
C9 +^ &FQ* ] w. ?FZ !|I/ $T
Customizable Apex Neptune Breakout Box 2x Toggle Switches Push Terminal
Brand New
$59.49
Was: $69.99was - US $69.99
or Best Offer
Free shipping
V+^I &* ] T2w.?!| /Z8 $ES p o n s o r e d
Customizable Breakout Box 6x Lighted Toggle Apex Neptune
Brand New
$97.74
Was: $114.99was - US $114.99
or Best Offer
Free shipping
19 watching
6O+ ^ &VU* ]9 wH 7.?I!| K/ $S p o n s o r e d
WiFi 2 in 1 Digital Salinity & PH Meter Salinity & PH Monitor for Aquarium
Brand New · Unbranded
$121.95
or Best Offer
Free shipping
+5Q ^0 &*A ] C Y 6wT.?!|/ $S p o n s o r e d
New BRS Ph Probe For Neptune Systems Apex Lab Grade Double Junction Reef Tank
Brand New · Neptune Systems
$70.00
$7.10 shipping
V+^T &J*M ] SD VwY.? DW!| / $
Coralvue HYDROS Wave Engine v2 Pump Controller New NIB
Brand New
$319.95
or Best Offer
$9.64 shipping
+K^ &*B ]6 Cw D.Q?! |/F M 6$
Milwaukee MC122 PRO pH Controller
Brand New · Milwaukee
(18)
$148.99
Free shipping
DF H+^D &* ]G w.?!9|/ $ T0
Milwaukee Instruments SMS122 PH Controller w/ PH Smart monitoring system
Pre-Owned
$64.99
Free shipping
+^ &CP* ] ANw RR .?D!|C/ H$
Hanna Instruments pH, Salinity, and Temperature Monitor - HI981520
Brand New
$299.99
Free shipping
+T^ U &* ] MwT.?! |Q/E $E
Neptune Systems APEX ALD Module Leak Detector With 4 Probes
Pre-Owned · Neptune
$79.99
Free shipping
J5 +^F 7&* ] Jw.G ?S5!|/ J $
Hanna Instruments pH, Salinity, and Temperature Monitor - HI981520
Pre-Owned
$225.00
or Best Offer
$6.36 shipping
+W0^ &* ] w.R?K! 7B |D/ $U
Guide for Trident Reagent Needle - Set of 3 - Reef Safe - APEX Neptune- 3D Print
Brand New
$6.49
or Best Offer
Free shipping
89 sold
+^J V A&T* 5 ] 4 VwX. ?!|/ $
SENEYE REEF AQUARIUM MONITOR - SENEYE
Brand New · seneye
(3)
$229.99
Free shipping
Only 1 left!
UJ+ ^ &7*J ] w B.3 ?!|SJ UE/ $
Neptune Systems Apex PM1 pH/ORP Probe Module Orange Label
Pre-Owned · Neptune Systems
$74.99
Free shipping
+1^ C &8*M ] Ow.?A! |/ $O
Neptune Systems Apex Unit + Energy Bar + Temp Probe - All tested and working
Pre-Owned · Neptune Systems
$425.00
or Best Offer
$37.00 shipping
13 watching
+Y^Q CL &* ] Ww.Y NJ R?!N |/ $
Milwaukee MC125 pH/ORP Controller w/probe
Brand New
$270.70
Free shipping
29 watching
F+^ &*0 43 FZ Q]B w.?! |4G/ $
Milwaukee Instruments SMS125 PH Controller w/ PH Smart monitoring system
Brand New
$100.00
or Best Offer
$10.12 shipping
+4^ A M8& 2E* ] ZVw T.?!|/G $S p o n s o r e d
PH Salinity Controller Meter WIFI Aquarium Tank Seawater Salt Tester Monitor Set
Brand New · Unbranded
$114.05
Was: $120.05was - US $120.05
Free shipping
K+^7 & *RB ] Bw.?!1 |/ O$S p o n s o r e d
WIFI PH Salinity Temp Controller Aquarium Tank Seawater Salt Test Monitor W2825
Brand New · Unbranded
$99.99 to $139.98
Free shipping
6+^ 1& *I N] w.V?3 R!|/ V$S p o n s o r e d
Customiz Breakout Box 5x Lighted Toggle Apex Neptune Emergency Button
Brand New
$144.50
Was: $170.00was - US $170.00
or Best Offer
Free shipping
2+^ &E N* ] w9 3.Y 78? 6!|/2 $S p o n s o r e d
MC122 PH Controller w/ PH Electrode - Milwaukee Instruments
AUTHORIZED DEALER - FULL WARRANTY - FAST FREE SHIPPING
Brand New · Milwaukee
(18)
$130.00
Free shipping
Only 1 left!
+^ S7& 3* Q] AF 5Lw.? !WZ|/ $
Seneye Home Aquarium Pond Ammonia PH Temperature Monitor
Brand New · seneye
(1)
$135.00
Free shipping
+W^ &*C L 9] wW.?C !|/ $6
Neptune Systems Apex PM1 pH/ORP Probe Module
Pre-Owned · Neptune Systems
$84.99
Free shipping
3 watching
P8+ ^ &W* ]D Jw.?!J |/ $
Milwaukee MC122 PRO pH Controller
Brand New · Milwaukee
(18)
$174.40
Free shipping
25 sold
AO+^ &6U* JC] w.K?K!|/ $
Milwaukee Instruments SMS122 PH Meter Smart Monitoring System w MA911
Pre-Owned
$79.97
or Best Offer
$7.99 shipping
U+^ I&* 4Y] w.?M!V H7 |W/ $
A3 Apex Jr. Aquarium Controller - Temperature, pH, Leak Detection & Level Sen...
Brand New · Neptune Systems
$442.64
Free shipping
84+^ &*VO ]9 wF .?!|/F $R
WIFI PH Salinity Controller Meter Aquarium Tank Seawater Salt Tester Monitor Kit
Brand New · Unbranded
$99.02
Was: $104.23was - US $104.23
Free shipping
+39 CU^ &* 8 2] w. M?!|H/ $S p o n s o r e d
2 in1 Digital Salinity & PH Meter Salinity&PH Monitor for Aquarium
Brand New · Unbranded
$79.64
$40.00 shipping
Only 2 left
P+Z^ &* YD U]M w.?!U|/ $0S p o n s o r e d
Neptune Systems - Apex Classic System - AquaController
Pre-Owned · Neptune Systems
(2)
$89.00
$8.24 shipping
+OH LZ^ BH &*1D ]6 w.R? !|/ $
Milwaukee Instruments MC122 PH Meter Smart Monitoring System Controller
Pre-Owned · Milwaukee
(18)
$60.00
or Best Offer
$5.91 shipping
2N 1+^ 8& 78 *T ] G w.?!E|/ $
American Marine Pinpoint pH Monitor + Probe USED
Pre-Owned
$40.00
or Best Offer
$9.10 shipping
+N^ &* ] wV.?!| /Q $M
MILWAUKEE INSTRUMENTS MC122 PH CONTROLLER WITH MP810 DOSING PUMP MC720 COMBO KIT
Brand New · Milwaukee
(6)
$169.99
Free shipping
+^ 5&* B] w .?!IC |D/ $V KK
Aquarium Submersible Camera 360 Felix Lite Smart Controller Saltwater Tank
Brand New
$490.00
or Best Offer
Free shipping
+E^2 &* J]V w.2?5!|/ $K1
Weipro PH2000 PH meter high Accuracy, PH online monitor, good quality reliable
Brand New
$69.99
Free shipping
+BE^ &* 9R ] Gw.?A !|QN 7/H $
Milwaukee Instruments SMS122 PH Controller w/ PH Smart monitoring system
Pre-Owned
$75.00
$11.00 shipping
AX+^ &F*G V] H w.P6 ?!|/5 $
GHL profilux 3 ex bundle
Pre-Owned
$350.00
$40.00 shipping
+7^ &* ]G wRL.?!|/ $CO 0
Milwaukee Instruments MC122 PH Meter Smart Monitoring System Controller
Brand New · Milwaukee
(18)
$125.00
or Best Offer
$13.20 shipping
11 watching
NM+^ 2W& *N3 ] wG.?6!| /R2 $
Milwaukee Instruments MC122 PH Controller w/ PH Smart monitoring system
Pre-Owned
$59.99
$14.99 shipping
6 watching
+E^ &C * ] CQw.? 6!Q|/ 3$
Milwaukee MC122 pH Controller w/probe
Brand New · Milwaukee
(18)
$174.40
Free shipping
7+^5 R W& V* ]T w.?!1P|/ $
Neptune Systems Apex Classic w/ auto feeder
Pre-Owned · Neptune Systems
$449.00
or Best Offer
Free shipping
12 watching
QR+^ & * N] w4. L?H !T|O 3H / $
Weipro PH2010A PH meter and controller, PH online monitor (No probe)
Pre-Owned
(2)
$59.97
or Best Offer
$4.52 shipping
R+^E & * K] 4 2w.?0 2J!|/ 31 $
Felix Lite: Aquarium Smart Controller + Monitor
Pre-Owned
$450.00
or Best Offer
$25.00 shipping
13 watching
+^19 &*P ]Z G w6. ?!|LD/ T$
clip on probe Electrode holder fixture support stand,PH Orp Acrylic reef tank #2
Brand New
(1)
$11.99
Free shipping
62+^ &* V]2 w8.?U!|/ 3A 1 $
Neptune Systems Apex VDM LED & Pump Control Module ONLY
Pre-Owned · Neptune Systems
$69.00
Free shipping
+X0^ &CZ* 8 ] Y Kw.H?! |G/ $
AMERICAN MARINE PINPOINT PH CONTROLLER - AQUARIUM WATER TESTER METER
Pre-Owned
$145.00
or Best Offer
$10.12 shipping
+^ &E* ] Hw .9W? C7! I|/ U$
Neptune Systems Apex Pro A3 Aquarium Controller
Brand New · Neptune Systems
$999.99
$6.99 shipping
G+^T &9* F ]DY wQL .J?H!|/ $
Seneye Reef Monitor for Temperature, Ammonia, pH, Water level, and Lighting
Brand New · seneye
$225.00
Free shipping
+^W &V* ] AV w.? !N|A/ $PKS p o n s o r e d
WIFI PH Salinity Temp real time Meter Aquarium Tank Seawater Salt Tester Monitor
Brand New · Unbranded
$99.99 to $139.97
Free shipping
+Y^0 &* 9 E] w EH .?79! P|E/ $S p o n s o r e d

Best Selling

See All

Milwaukee 716690 PH Controller
(18)
$99.99 New
$60.00 Used
Milwaukee Instruments Ph & ORP Controller Mc125
Seneye Reef Aquarium Monitor and Par Meter
(3)
$229.99 New
$219.99 Used

Water Type

Aquarium pH Level Meters and Controllers

Shop by Category

134 Results

Milwaukee Instruments MC122 Multifunction pH controller

New ListingHydros Control X4 / XP8 PRO Pack Reef Aquarium Controller Reef Tank OPEN BOX!

Customizable Apex Neptune Breakout Box 2x Lighted Toggle Switches Push Terminal

Customizable Breakout Box 4x Lighted Toggle 2x Push Button for Apex Neptune

New ListingNeptune Systems Apex A2 Energy Bar, Base unit, Probes, Original Box

Neptune Systems Apex Lab Grade Ph And Orp Probe Mfg 2018

New ListingNeptune Systems Apex Classic Pro Aquarium Controller System (Wifi)

Hydros Control X4 / XP8 PRO Pack Reef Aquarium Controller Reef Tank NIB

Neptune Systems APEX A3 Pro New Sealed In Box

Coralvue HYDROS Control X10 Controller & Dosing System New NIB

Used Neptune Systems Apex Lab Grade Ph Probe Double Junction

GHL Profilux 4 Aquarium Controller.

KH Controller

Customizable Apex Neptune Breakout Box 2x Toggle Switches Push Terminal

Customizable Breakout Box 6x Lighted Toggle Apex Neptune

WiFi 2 in 1 Digital Salinity & PH Meter Salinity & PH Monitor for Aquarium

New BRS Ph Probe For Neptune Systems Apex Lab Grade Double Junction Reef Tank

Coralvue HYDROS Wave Engine v2 Pump Controller New NIB

Milwaukee MC122 PRO pH Controller

Milwaukee Instruments SMS122 PH Controller w/ PH Smart monitoring system

Hanna Instruments pH, Salinity, and Temperature Monitor - HI981520

Neptune Systems APEX ALD Module Leak Detector With 4 Probes

Hanna Instruments pH, Salinity, and Temperature Monitor - HI981520

Guide for Trident Reagent Needle - Set of 3 - Reef Safe - APEX Neptune- 3D Print

SENEYE REEF AQUARIUM MONITOR - SENEYE

Neptune Systems Apex PM1 pH/ORP Probe Module Orange Label

Neptune Systems Apex Unit + Energy Bar + Temp Probe - All tested and working

Milwaukee MC125 pH/ORP Controller w/probe

Milwaukee Instruments SMS125 PH Controller w/ PH Smart monitoring system

PH Salinity Controller Meter WIFI Aquarium Tank Seawater Salt Tester Monitor Set

WIFI PH Salinity Temp Controller Aquarium Tank Seawater Salt Test Monitor W2825

Customiz Breakout Box 5x Lighted Toggle Apex Neptune Emergency Button

MC122 PH Controller w/ PH Electrode - Milwaukee Instruments

Seneye Home Aquarium Pond Ammonia PH Temperature Monitor

Neptune Systems Apex PM1 pH/ORP Probe Module

Milwaukee MC122 PRO pH Controller

Milwaukee Instruments SMS122 PH Meter Smart Monitoring System w MA911

A3 Apex Jr. Aquarium Controller - Temperature, pH, Leak Detection & Level Sen...

WIFI PH Salinity Controller Meter Aquarium Tank Seawater Salt Tester Monitor Kit

2 in1 Digital Salinity & PH Meter Salinity&PH Monitor for Aquarium

Neptune Systems - Apex Classic System - AquaController

Milwaukee Instruments MC122 PH Meter Smart Monitoring System Controller

American Marine Pinpoint pH Monitor + Probe USED

MILWAUKEE INSTRUMENTS MC122 PH CONTROLLER WITH MP810 DOSING PUMP MC720 COMBO KIT

Aquarium Submersible Camera 360 Felix Lite Smart Controller Saltwater Tank

Weipro PH2000 PH meter high Accuracy, PH online monitor, good quality reliable

Milwaukee Instruments SMS122 PH Controller w/ PH Smart monitoring system

GHL profilux 3 ex bundle

Milwaukee Instruments MC122 PH Meter Smart Monitoring System Controller

Milwaukee Instruments MC122 PH Controller w/ PH Smart monitoring system

Milwaukee MC122 pH Controller w/probe

Neptune Systems Apex Classic w/ auto feeder

Weipro PH2010A PH meter and controller, PH online monitor (No probe)

Felix Lite: Aquarium Smart Controller + Monitor

clip on probe Electrode holder fixture support stand,PH Orp Acrylic reef tank #2

Neptune Systems Apex VDM LED & Pump Control Module ONLY

AMERICAN MARINE PINPOINT PH CONTROLLER - AQUARIUM WATER TESTER METER

Neptune Systems Apex Pro A3 Aquarium Controller

Seneye Reef Monitor for Temperature, Ammonia, pH, Water level, and Lighting

WIFI PH Salinity Temp real time Meter Aquarium Tank Seawater Salt Tester Monitor

Best Selling

Milwaukee 716690 PH Controller

Milwaukee Instruments Ph & ORP Controller Mc125

Seneye Reef Aquarium Monitor and Par Meter

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