Aquarium Pharmaceuticals® API Replacement Filter Cartridge for Tap Water Filter

5% Rewards:

130 $1.30 off a Future Purchase

AP4131

This item has been discontinued.

Aquarium Pharmaceuticals, API, MARS Fishcare Ready-to-use replacement cartridge for the Tap Water Filter. Easily connects to Tap Water Filter to continue making perfect deionized aquarium water.


Manufacturer Info

Aquarium Pharmaceuticals Aquarium Supplies
Aquarium Pharmaceuticals (API) has been helping people take good care of ornamental fish for over 40 years. Their research and development scientists have advanced the care of fish with all-natural medications, stable bacteria for biological filtration, one-bottle test kits, consumer-friendly dosing caps and much more. They’ve received over 25 global patents for their breakthrough innovations in the aquatics industry. And they continue to look for ways to improve the fishkeeping experience for hobbyists. Research. Experience. Dedication to scientific, quality treatment for healthy fish. It’s what makes API the first choice of aquarium owners. API manufactures and sells hundreds of products across many different product categories, including aquarium and pond treatments, aquarium equipment, aquariums and fish nutrition.


Warranty

No Warranty

Ask a Question Earn 25 Points when you ask a question
Sort By :
 
9 Questions
Displaying questions 1-9
 
 
Write Your Review Earn 25 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.5

23 Reviewers (100%) would recommend this

Overall Rating:

download image
5  Star
 14
4  Star
 7
3  Star
 1
2  Star
 1
1  Star
 0
 
“Why is this discontinued”
5
5.0
I've used this simple API Replacement Filter Cartridge for Tap Water for more than 20 years. It has served me well for my 55 gal marine aquarium. Where can I order this? I would buy in bulk just in case they discontinue for good. Thank you. Andy
  • 1
Was this review helpful: Yes(0)No(0)
 
 

“Great time & $ saver”
5
5.0
The filter in its system is such a money saver. In that you don't have to buy your water or spend any gas money to obtain it. Highly reccomend this item along with the filter system.
  • 1
Was this review helpful: Yes(0)No(0)
 
 

“filter”
5
5.0
it is good if you do not have a lot tanks a 10gph it take a lot of time when you have a lot of tank.
  • 1
Was this review helpful: Yes(0)No(0)
 
 

“Tap water filter”
4
4.0
API's tal water filter works very well to filter the chemicals out of normal tap water. If you are on a tight budget, pick one up. The only downfall for me is that the water where I am is crap and so I am only able to get about 40 gallons of filtered water before it's time to replace the filte...Read More
  • 1
Was this review helpful: Yes(0)No(0)
 
 

“Clean water”
4
4.0
Great filter....water is perfect and fish are happy...
  • 1
Was this review helpful: Yes(0)No(0)
 
 

“Review of product”
4
4.0
Works great. Fixed my water problem.
  • 1
Was this review helpful: Yes(0)No(0)
 
 

“tapwater filter”
5
5.0
love it love it does not waste water as ro does
  • 1
Was this review helpful: Yes(0)No(0)
 
 

Write Your Review Earn 25 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.5

23 Reviewers (100%) would recommend this

Overall Rating:

download image
5  Star
 14
4  Star
 7
3  Star
 1
2  Star
 1
1  Star
 0
 

Free, Fast, and Flexible Shipping Options

  • Most products ship free—no minimum purchase required

    We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 5-7 business days.

  • upgrade your shipping for only $4.99—free upgrade for orders $199+

    Over 90% of our members receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $4.99—or spend $199 and we’ll upgrade you automatically!

  • need your order even faster? no problem!

    Expediated shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.

  • buy it today and we'll ship it today

    Same-day shipping is available Monday-Friday for most products—place your order by 10 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.

Learn More About Shipping

60-Day Return Period with Easy Online Returns

Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.

A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.

Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.

Learn More About Returns

Earn 5% Cash Back for Most Purchases

Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!

  • Most Products
    Earn 5 reward points for every $1 you spend to get 5% cash back
  • Marine Depot, AquaMaxx, Accel Aquatics, and Korallin
    Earn 6 reward points for every $1 you spend to get 6% cash back
  • EcoTech Marine, NYOS, and Aqua Illumination
    Earn 1 reward point for every $1 you spend to get 1% cash back

You can also get bonus reward points by purchasing select items during special sales and promotions.

Learn More About Rewards

Your Recently Viewed Items