Please recomend fresh tests The tabs in foil? Kordon sells one that will work with their Amquel+. Will replace expired tabs free. I am done with the test kits from AP (aquarium stores.)
ORP meter Which one do you like trust worthy starter meter
ORP Meter Price: $103.00 This little
meter offers
ORP data at a very affordable price. Detachable probe with 10' cable uses BNC connector and is accurate to ±1 mV. Epoxy-covered electrode with a platinum band and silver/silver chloride (Ag/AgCl) tip. For calibration, it has an easy-to-use offset screw. Liquid crystal display
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Meters 
pH/ORP Meter w/Cabled pH Electrode Price: $110.00 Completely waterproof. This rugged, waterproof
meter is low in price but packed with features. It is a high-quality pH
meter that converts to an
ORP meter with a $59 probe! The large LCD simultaneously shows pH (ATC) and temperature in ºF or ºC (Note: Does not read temperature in
ORP mode). The internal
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Ph Meter |
Orp 
Water Quality Meter Price: $158.00 Using interchangeable probes, this versatile
meter is capable of reading pH, mV, conductivity, TDS, D.O., temperature and
ORP. The probes electronically retain calibration so that no recalibration is required when changing probes. Features include an RS232 port for computer communication, auto power
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Do Meter |
Conductivity Meter 
ORP Check Solution, 240 mV Price: $23.00 Formulated tocheck the calibration ofORP
meters; 460-ml bottles. Shelf life is 6 months.
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Orp Solution |
Orp 
Multiparameter Instrument by YSI,Professional Plus Instrument Price: $975.00 Can measure combinations of D.O., temperature, pH, conductivity, salinity, TDS,
ORP, ammonium, nitrate, chloride and barometric pressure. Automatic temperature, salinity and barometric pressure compensation. User selectable probe and cable options. Automatic buffer recognition.Test up to 11 different
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Multiparameter |
Ph Meter |
Do Meter 
Multiparameter Meters, Waterproof, EC, Resistivity, TDS, Temp Ultrameter II Price: $700.00 Combinations of conductivity, resistivity, TDS, pH,
ORP and temperature. Ultrameter II
meters perform to analytical lab standards yet are durable enough to use in the field (and with just one hand!).
Meter accuracy is ± 1% of the reading, not merely full scale, and the display shows values to 9,999.
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pH/Temp Meter Price: $340.00 Available in two models, these microprocessor-based pH/Temp
meters are housed in a waterproof casing that is built to last. They are an excellent choice for pH and
ORP measurements. Both
meters offer one- or two-point calibration using any of 5 memorized solutions, including NIST 6.86 and 9.18. The LCD
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Orp 
Laboratory Grade ORP Probe Price: $217.00 In-line/Submersible This
ORP electrode is permanently encapsulated in a CPVC body and has 3/4" NPT threads on both ends. Can be installed in a tee fitting for in-line use or on a PVC submersion pipe for under water use. BNC connector, 10' cable. Double-junction with stripped ends for ATC element
... 
ExStik 4-in-1 Water Quality Meter Kit Price: $230.00 The 4-in-1 Water Quality
meter with ATC accurately checks chlorine levels and has interchangeable flat surface probes to measure pH and
ORP. The
meter has automatic electronic self-calibration for chlorine and
ORP; 1-, 2- or 3-point buffer calibration for pH; and a "CAL" indicator to tell the
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