Osmosis Easy Line Professional 50 GPD by Aqua Medic

The Easy Line Professional 50 GPD from Aqua Medic is a compact, powerful reverse osmosis (RO) unit intended for producing softened, low-salt (desalinated) water. It’s designed for applications such as marine and freshwater aquaria, terrarium spraying/misting, and other situations where high-quality water (low dissolved solids / low contaminants) is needed.

With a nominal output of 50 gallons per day (GPD), the unit under standard ideal conditions produces about 190 litres/day of RO water.

Here are the important parts and what the system includes:

• Pre-filtration stages:
  • Sediment filter that captures particles larger than ~ 5 µm.
  • Activated carbon prefilter to remove chlorine and organic compounds that could damage the RO membrane.

• Membrane module:
  • The heart of the system: a TFC (thin-film composite) membrane made of polyamide / polysulfone.
  • Accompanied by a flow-restrictor and pressure piping.

• Water yield and rejection:
  • Salt / TDS rejection of up to ~ 98% under ideal conditions.
  • Recovery ratio or “waste:pure water” of about 3-4:1 (i.e. for every part of clean water, 3-4 parts are reject/waste).

• Convenience / plumbing features:
  • A pressure switch that allows the system to automatically fill a pressure tank (tank not included). This helps have treated water ready more quickly.
  • A mounting plate so the unit can be wall-mounted or simply placed on a flat surface.
  • An integrated pressure gauge (manometer) to monitor feed water / system pressure.
  • A chrome-plated tap extension, so you can choose between osmosed (filtered) water and tap water via a diverter at the tap. The extension can remain permanently connected.
  • Universal faucet adapter included (for tool-free connection to most domestic faucets). Suitable for mixing nozzles / aerators with 22 mm internal thread or 24 mm external thread.

• Physical build / size:
  • Compact footprint: approximately 370 × 160 × 160 mm (Length × Width × Height).
  • The unit is relatively lightweight, meant for under-sink or concealed installation but with easy access for filter changes.

• Spare parts & options:
  • Membrane specific for 50 GPD model: U711.050.
  • Prefilters: sediment 5 µm, activated carbon prefilter with fittings.
  • Flow restrictor tailored for the 50 GPD model (ensures the correct waste/pure ratio).

Practical Use

What you can expect under real conditions, and what affects performance:

• Output depends heavily on feed water temperature, feed water pressure, and how clean the input water is. In lower temperature or low pressure situations, the daily output will drop.

• Waste water is significant because of the 3-4:1 ratio; you'll need to account for that in your water usage. Some waste can sometimes be reused for non-sensitive applications or gardening if safe.

• Prefilter maintenance is very important. If the sediment or carbon filter is clogged or exhausted, membrane life and rejection will suffer.

• Regularly check the pressure gauge: drop in pressure may indicate clogged prefilters or other issues.

• The membrane itself is a consumable and will need replacement after some period, depending on water quality, usage, etc.

This model is especially suitable for:

• Medium-sized aquariums (saltwater or freshwater) that require fairly frequent water changes.

• Terrariums, misting or spraying systems where water purity matters (less minerals, fewer contaminants).

• Households wanting RO water for mixed uses (aquaria, maybe for ironing / certain appliances), but without needing huge output.

• Situations where space is limited — its compact design helps install under sinks, inside cabinets, etc.

Things to Consider when using the Osmosis Easy Line Professional 50 GPD

• If your feed water has high hardness, very high TDS, or large amounts of contaminants, the prefilters will need more frequent replacement, and membrane life may be shorter.

• In cold weather or with low feed pressure, you’ll likely see output drop significantly below the nominal 190 L/day.

• The 3-4:1 waste ratio means quite a bit of reject water — not ideal if you are trying to minimize water usage or cost.

• Some parts are consumables and replacement cost should be budgeted: membrane, prefilters, possibly carbon block, etc.