*	Tap water filter for producing contaminant free, deionized water for reef, saltwater, freshwater, and planted aquariums

*	Sets up easily in no time - just hook up to any faucet (no tools needed and much easier to set up than RO/DI units!)

*	Filter resin effectively removes impurities and dissolved solids from your tap water

Single-cartridge tap water filtration system features super activated carbon and color-changing ion-exchange resin to make tap water perfect for aquarium use. Filter resin gradually changes color as it's working - proving effective filter performance and illustrating remaining filter life. Comes fully assembled and attaches to any faucet. Produces an average of 25 to 125 gallons of perfect aquarium water, depending on the mineral content of your tap water, before a new cartridge is needed.

The API Tap Water Filter uses a disposable, easy-to-replace cartridge to remove sediments, chlorine, chloramine, heavy metals, organic chemicals, and inorganic ions from tap water - creating contaminant-free deionized water for reef, saltwater, freshwater, and planted aquariums.

Complete with universal faucet adapter, extension tube, connector, Electro-Right, and pH adjuster.

Please click on "More Information" for installation instructions and how to change the filter cartridges.

The Tap Water Filter makes approximately 10 U.S. gallons (37.8 L) of contaminate-free deionized water per hour. Tests of the filter showed an average yield of 50 U.S. gallons (190 L) of purified water and a typical maximum yield of 150 U.S. gallons (570 L), depending on the level of minerals and contaminants in the tap water source.

Installing the Universal Faucet Adapter to your faucet:

Faucets with External Faucet Threading:

Unscrew the aerator from your faucet. The adapter has a built-in aerator.
Screw the Universal Faucet Adapter to your faucet – hand-tighten only.

Faucets with an Internal Faucet Threading:

Unscrew the aerator from your faucet.
Select the threaded adapter that fits inside your faucet.
Screw the threaded adapter to the Universal Faucet Adapter. Be sure to place the washer inside the top of the adapter before connecting it to the faucet.
Screw the Universal Faucet Adapter to the faucet – hand-tighten only.

Removing the Caps and Installing the Tubing:

Twist the cap while applying an upward pulling motion. A gentle twist and pull with a small pliers may be used, but be careful to avoid squeezing the cap too hard.
Attach one section of tubing over the inlet barb located on the bottom of the unit.
Attach the other end of this tubing from the Tap Water Filter to the outlet barb on the Universal Faucet Adapter.
Attach the other section of tubing over the outlet barb located on the top of the unit.
Direct the flow of water either through the aerator or the outlet barb by gently sliding the diverter plug to the left or right.

Using the Tap Water Filter:

The Tap Water Filter is easy to use. Just place the filter on a level surface (the kitchen sink or counter is ideal).

Collect the deionized water in any clean plastic container.
Using a measuring cup, slowly increase the water flow through the filter to 1 cupful (8 fl oz./240 ml) in 25-30 seconds. This flow rate is equal to about 10 U.S. gallons (37.8 L) per hour. The Tap Water Filter is designed to work efficiently at this rate.

Changing the Filter Cartridge:

Unscrew the Tap Water Filter top from the exhausted cartridge. DO NOT remove the pad. Save the compression spring (if used). Rinse and save the gasket.
Unscrew the top lid from the new cartridge and remove the protective seal. DO NOT remove the pad.
Screw the Tap Water Filter top onto the new cartridge, making sure the compression spring and a rubber gasket are in place.
Screw the lid onto the top of the exhausted cartridge.
Turn the new cartridge upside-down; remove the bottom lid and protective seal. DO NOT remove the pad. Rinse and save the gasket.
Unscrew the Tap Water Filter base from the old cartridge; making sure a rubber gasket is in place.
Put the lid onto the exhausted cartridge.
The Tap Water Filter is now ready to continue making perfect water for your aquarium.

Frequently Asked Questions

Q.	Will a water softener help more gallons of deionized water?

Q.	Sometimes I get an open space just above the carbon bed. Why?

Q.	When I make saltwater water the pH never stabilizes to 8.2-8.4. Does deionized water lower pH?

Q.	My original cartridge made 75 gallons of deionized water, the second cartridge made only 50 gallons. Why?

Q.	Can I run reverse osmosis water through the Tap Water Filter?

Q.	The Tap Water Filter makes pure water. Why can't I drink the water made with the Tap Water Filter?

Q.	How many gallons of water will the Tap Water Filter make?

Q.	Will a water softener help more gallons of deionized water?
A.	No. Water softeners simply exchange sodium ions for calcium and magnesium ions. The softener is just trading a calcium (+2 charge) for two sodium ions (+ 1 charge x 2). The resins in the Tap Water Filter do not distinguish between sodium ions and water hardness ions ... it's all the same to the resin. The two sodium ions use the same amount of resin capacity as the single calcium ion.

Q.	Sometimes I get an open space just above the carbon bed. Why?
A.	The open space forms as the resin compacts in the cartridge. We strive to pack the resin as tightly as possible to avoid the compaction space. An open space is not detrimental to water quality. You might also see some of the resins settling down into the open space. A small amount of resin swirling in the open gap is acceptable. The entire resin bed, however, should not separate.

When I make saltwater water the pH never stabilizes to 8.2-8.4. Does deionized water lower pH?

No. Deionized water has no pH adjusting properties. The pH of your marine aquarium is regulated primarily by the buffer system created by the synthetic sea salts. If the salt manufacturer does not properly blend in the buffer salts the final solution will have a pH other than 8.2-8.4. Some synthetic sea salts consistently run "low" or "high" depending on the manufacturer's formula and blending techniques. Tap water may contain a significant amount of carbonate hardness (KH), which boosts the pH of "low pH sea salts". When you start using pure water, you might need to use a pH buffering product to raise the KH of the saltwater and increase the pH.

My original cartridge made 75 gallons of deionized water, the second cartridge made only 50 gallons. Why?

The level of dissolved minerals and pollutants in tap water can vary daily. The level of these dissolved substances is measured as Total Dissolved Solids (TDS). The tap water in our laboratory varies from 200 to 400 ppm TDS on a daily basis. Our Quality Control Department pulls Tap Water Filters off the production lines and tests them with our tap water. They have to know the TDS of the tap water the day they test the cartridges. Why? A jump in TDS from 200 to 400 ppm means that a cartridge will produce only half as much water as the day before. It all depends on the quality of the incoming tap water. It would be unusual if you did get exactly the same number of gallons out of every cartridge!

Can I run reverse osmosis water through the Tap Water Filter?

Yes. Reverse osmosis systems can significantly reduce TDS levels if properly maintained. RO, however, is not nearly as pure as deionized water. Many aquarists run their RO water through the Tap Water Filter to scavenge out the traces of nitrate, phosphate, silicate, etc that the RO lets through. Running RO water through the Tap Water Filter will give you pure water and extend the life of the cartridges. DO NOT connect the Tap Water Filter in-between an RO system and a pressurized storage tank. The Tap Water Filter is a low-pressure system and cannot stand the pressure of a closed RO system. Simply let the RO water pass through the Tap Water Filter and collect the water in a bucket or storage container.

The Tap Water Filter makes pure water. Why can't I drink the water made with the Tap Water Filter?

We state on the package that the Tap Water Filter is not intended for human consumption. No doubt you've heard about bacterial and parasitic contamination of drinking water. The Tap Water Filter does not remove or kill bacteria or parasites that may contaminate drinking water. If your drinking water was contaminated with bacteria or parasites, the Tap Water Filter would not produce safe drinking water. Recent studies have shown that tap water filtration systems sold for making drinking water very quickly become contaminated by bacteria. This is especially true of reverse osmosis filters. Any tap water filter used to make drinking water need to be disinfected every six months. This includes the filter housings and tubing. Therefore use the Tap Water Filter only for your aquarium.

How many gallons of water will the Tap Water Filter make?

The amount of deionized water produced by the Tap Water Filter depends entirely on the level of minerals, heavy metals, phosphate, nitrate, etc. that is in your tap water. Each cartridge has a fixed ion exchange capacity. In New York City for example, aquarists can produce up to 300 gallons of pure water with a single cartridge. An aquarist in northern New Jersey, however, made 15 gallons of water. An analysis of the NJ water showed very high levels of copper, zinc, phosphate, nitrite, and nitrate in addition to the normal hardness minerals. A heavily polluted water source will use up a cartridge much sooner than a water supply low in minerals and pollutants. Most aquarists produce somewhere between 50 and 150 gallons per cartridge.