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MERO 100 GPD ChloraMEno 5 STAGE System

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The MERO 100 GPD 5 Stage  ChloraMEno RO/DI system is designed and constructed to be the best choice for residential reef enthusiasts, service companies and local aquarium stores.  Every user has different needs and demands so ME allows for customization via many options to meet the needs for top off, new Seawater makeup, and Freshwater drinking systems.
The MERO  ChloraMEno is designed to eliminate chloramines, ammonia, chlorine, toxic metals, etc, using 2 chambers of high capacity catalytic carbon.  Standard is 100 GPD flow rate with option to increase up to 300 GPD. Also standard is a triple probe TDS Meter so we can monitor entire system performance at a touch of a button.  The MERO comes standard with a no rust black bracket and hardware; white is available.  ME feels we have designed the best possible units available; however if you need further customization let us know.
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Black comes standard! White works in laundry near white appliances.

Drinking Water Kit

Bladder Tank with shutoff valve, etc

GPD Capacity

100 GPD is standard. Each 100 GPD upgrade will come installed.

Booster Pump Kit

Kit includes pump, check valve, transformer, high pressure switch.

Drain Saddle

Drain saddle lets waste water drain down the sink . PVC drain.

Under sink In line Sink Adapter

Fits into Most Undersink Hoses.

DI Canister addition

Includes DI Resin and refillable shell. Plumbed and mounted.



Included with every ChloraMEno 100 GPD  5 Stage system 

Premium 1 micron Sediment Filter 10 inch
Double probe TDS Meter
2 catalytic carbon cannisters packed in refillable cartridges
Drain ball valve to rinse carbon
100 GPD High Quality TFC RO Membrane (made in USA)
Mixed Bed Color Indicating Zero TDS DI resin packed in refillable cartridge
Black Heavy Duty no rust Aluminum Mounting Bracket and Black canister tops, (white available)
Quick Connect Fittings standard
1/4″ Hose Bib Adapter for incoming water
10″ Canister Filter Wrench for easy filter changes
6 feet of supply tube, drain tube and product tube
MERO Instruction manual
Pressure gauge kit installed
Ball Valve Flush Kit installed (flushing membrane extends membrane life)
Hydraulic Automatic shut off switch and check valve installed
Every MERO system is hand built in the USA. Providing you the highest quality.
All MERO units are pressure checked at the factory to confirm fittings are sealed
One Year warranty

MERO ADVANCED UNITs come with everything above making it a very complete and advanced system producing TDS free and Chlorimine free clean water.  Some people have different needs so the following options are available.

Available Options

Black Color is Standard; however White is available

GPD- standard is the 100 GPD RO Membrane ; 200, and 300 GPD are available options

Additional DI Resin Canister –Some prefer running dual DI canisters to lengthen replacement time.

Booster Pump Kit –If city water pressure is below 45 psi a Booster kit may be needed to increase membrane performance.   Check the pressure gauge included with every MERO system.

Drain saddle — used so waste water goes down sink drain

Under sink inline adapter –3/8 Female x 3/8 Male Thread with Quick Connect Fitting for 1/4 inch Tube.  Fits into Most Undersink Hoses.

Drinking Water Kit–Bladder Tank with shutoff valve, 3rd Faucet, Ice Maker Tee, Choice of adapters, Drain Saddle, Filter Wrench

Operating Pressure: 45-85 PSI
Optimal Input Water Temperature: 70-77° F (21-25° C)
Output Rating: Output of MERO  RO/DI systems are measured with a water pressure of 50 PSI, 75° F water and an input TDS of 110.



STAGE 1 and 2 CANISTERS  are full of MERO special catalytic carbon (CC) in refillable cartridges.   Incoming city water passes first through TDS Probe 1 indicating how much dissolved solids are in your city water.  The first 2 canisters are full of  catalytic activated carbon (CC) designed to reduce chloramines and ammonia.  Carbon also removes chlorine, organics, and other toxic chemicals from the water.  Reducing chlorine, chloramine, ammonia, etc is also important for extending RO Membrane life, as membranes are not chlorine/chloramine tolerant.

Flush kit after Dual Catalytic Carbon. Carbon releases dust and particles, especially when cartridges are being refilled.  To avoid pushing this dust into the next chamber we have added a Custom Flush Valve kit to rinse the carbon.  After refilling a cartridge open the flush valve to run water through the GAC to rinse it.  Once water comes out clear close the valve allowing water to move to Stage 2.

STAGE 3 CANISTER has a 1 Micron Sediment Filter which removes sediment and other particles of 1 micron or larger.  This includes any carbon particles that came loose from the first 2 stages.  This filter removes silt and other particulate matters that may clog the membrane.

PRESSURE GUAGE tests the pressure entering Stage 3 The RO Membrane.  Optimal pressure is between 45-85 psi.  Minimum is 40 psi. Also used to check for drops in pressure due to dirty sediment filter.

STAGE 4 RO MEMBRANE  The membrane reduces TDS total dissolved solids, such as salts, heavy metals, or calcium.  This is the most expensive of the replacement filters.  Typically lasting 2-3 times longer than the other filters.  Our goal is to extend membrane life by allowing the GAC and Sediment filter to remove as much as possible before the membrane.  A properly functioning membrane should provide a minimum of 90% reduction in TDS (typically more, test a new one).  That’s why the MERO units have TDS Probe 2 after the membrane and before the DI Resin (Stage 4).  IE:  If city water is entering the system at 100 TDS as indicated by TDS Probe 1.  Then a good membrane will reduce 90%, leaving 10 TDS after the membrane.  This is monitored by looking at TDS probe 2 which reads after the membrane.  As this number drops, try running the MERO membrane flush kit for 15 minutes cleaning the membrane.  Membranes can deteriorate due to clogging or scaling so flushing helps extend life.  Membranes also fail due to contact with chlorine.  This could be due to high levels of chlorine or chloramine in city water, or poor Carbon (CC) filter upkeep.  Flush the Catalytic carbon from time to time, and replace as needed.  Along with flushing the membrane periodically.

MEMBRANE FLUSH KIT mentioned above is between Stage 3 and Stage 4.

STAGE 5 DI RESIN  The MERO Deionization (DI) media in a refillable cartridge is the final stage.  This resin will remove the remaining TDS and produce zero TDS water.  This is measured by TDS Probe 3.  A rise in TDS above zero lets us know the resin is becoming exhausted and may need replacing.  MERO uses color changing DI Resin which changes from blue to rust color as the resin gets exhausted; however TDS is a better indicator of when to replace the resin because the color may change to rust before it’s exhausted.  If your membrane is not working properly, it will also lead to an increase in DI exhaustion.   Also if your water has chloramines the DI will remove them; however this will burn up DI resin and be more expensive than replacing carbon.  Deionization resin reduce silica, nitrates and phosphate levels. MERO uses only virgin (not reactivated) nuclear grade color indicating resin of the highest quality.   Would you expect anything different from ME!


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