1-800-566-3474
Live Chat Support
    Free Shipping On $175+
  • FREE Shipping On $175+
  • 14-Day Low Price Guarantee
  • 14-Day Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
FREE Shipping on
Orders Over $175
Standard ground shipping (1-7 business days) starts at a low $5.99 and most orders over $175 ship FREE. Learn More
 
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you've purchased the item! Learn More
 
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 6 pm EST ship the same day! Learn More
 
Home » Freshwater Aquarium Supplies  » Additives & Supplements  » pH/KH Buffers  » Dry & Liquid  »  Aquarium Pharmaceuticals® API pH Down 16oz
Aquarium Pharmaceuticals® API pH Down 16oz

Aquarium Pharmaceuticals® API pH Down 16oz

In Stock: Buy now and your order will ship the next business day
Item #:
AP1355
Quantity:
MSRP: $17.99
You Save: $5.50 (30%)
15% Off Site-Wide: Black Friday Blowout (Exclusions apply)
Use Coupon at checkout: BLACKFRIDAY2014
Valid From 11/21/2014 - 12/1/2014
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More
 

Aquarium Pharmaceuticals® API pH Down 16oz Information




Lowers pH and makes aquariums more acidic. Fast-acting, colorless and easy-to-use.

Purpose and Benefits:
  • pH Down is a liquid pH lowering product for freshwater aquariums. pH Down lowers pH by neutralizing carbonate hardness in the water.
  • Adjusting the pH to the proper level will improve fish health, disease resistance, coloration and breeding. While many common aquarium fish will live in water with a pH range of 6.8 to 7.5, a pH of 7.0 is ideal for a community aquarium containing a variety of freshwater fish. Live bearers like mollies and swordtails prefer a higher pH of 7.2-7.6. Acid-loving fish such as angelfish and neon tetras prefer a lower pH of 6.5-6.8.
  • Each dose of pH Down neutralizes some of the carbonate hardness and lowers the pH. The pH may rebound up to the original pH if the carbonate hardness is high. Several consecutive treatments with pH Down may be necessary to lower pH, but if there are fish present in the aquarium, the pH should not be changed more than .2 in a 24 hour period. The number of doses required to lower the pH will depend on the carbonate hardness level and the desired pH level. An aquarium with low carbonate hardness may require one treatment with pH Down while an aquarium with a high carbonate level will require several.
Directions for Use:
  • Use Aquarium Pharmaceuticals Freshwater pH test Kit to determine the pH of the aquarium.
  • To lower pH, add two drops of pH Down for every U.S. gallon (3.78 L) of aquarium water.
  • Take another pH reading before making the next addition of pH Down.
  • If fish are present in the aquarium, do not change the pH more than 0.2 in a 24 hour period (for example, from 7.2 to 7.0).
Compatibility: pH Down contains no phosphates and may be used with live plants.

How much pH Down will it take to lower my pH?
The amount of pH Down required to lower the pH of aquarium water depends on several factors. The primary cause of high pH is an elevated carbonate hardness (KH) level. Carbonate hardness, also known as alkalinity, is found in tap water and may also leach from aquarium gravel, ornamental shells, and coral. Each dose of pH Down neutralizes some of the carbonate hardness. It may take several doses of pH Down to neutralize enough carbonate hardness to lower the pH.

Why does my pH level drop after adding pH Down then bounce back up the next day?
pH rebound occurs when the carbonate hardness is high. Aquarium water with high carbonate hardness resists pH change.

Does pH Down contain phosphates?
No. pH Down contains no phosphoric acid or phosphates.

Can I add more than the recommended dose of pH Down?
Always follow the directions when using pH Down in the aquarium. Many aquarists treat a separate bucket of water with pH Down to adjust the pH before adding the water to the aquarium. Add as much pH Down to the bucket as necessary to lower the pH to the desired level. Once the pH has stabilized (12-24 hours), add the water to the aquarium.

Can I use pH Down in a saltwater aquarium?
Marine salts are formulated with a large amount of carbonate buffer to stabilize the pH. Each brand has its own unique formula and pH range. While adding pH Down to a saltwater aquarium is not harmful, it should not be used to adjust pH. Use Proper pH 8.2 to adjust and stabilize pH in saltwater aquariums.




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.

Aquarium Pharmaceuticals® API pH Down 16oz Reviews



Average Rating
(1 reviews)
Sort Reviews By:


?

by
Reviewers Rating Great


Posted: 8/15/2013 from BENICIA, CA UNITED STATES
3.5 5
Experience Level: Intermediate


Comments: Too early go make a sound judgement on this product...cleaned my whole 150 gal tank incl, pump,hoses,and added product...ok so far...


Did you find this review helpful? Yes No



Accessories for Aquarium Pharmaceuticals® API pH Down 16oz



Aquarium Pharmaceuticals® API pH Down 16oz Window Navigation Prev Next Zoom Close
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: Aquarium Pharmaceuticals® API pH Down 16oz

First tell us about yourself.

Name to display on the review: Location (ex: Anaheim, CA):
Your experience level:


How would you rate this product?

Review Title:


Write your review:
(Please focus on product quality and performance)

This item is temporarily unavailable but will be back in stock soon.

Item #
Price:
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.

Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

Your Email:
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Price:
Your Email:
If you find a product we sell for a lower price at another online store, we will match their price—today and up to 14 days after you’ve purchased the item!

Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions.

Price *
Shipping Cost *
Competitor's Website *

Add to Wish List
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
Priority:
Email Specials
Subscribe to our newsletter feed.
Newsletter Tips & Tricks! New Products!
Discounts & Promos!
Testimonials
Nov 11, 2014
"The site is easy to navigate, the prices are competitive, and when I've called Customer Service, they have been more than helpful."
Alijean

Nov 5, 2014
"Marine Depot continues to set the benchmark for online shopping."
cubera

Nov 4, 2014
"Love the company and they have a great selection and excellent customer service."
Alisha

Save Money Get our best deals, product how-tos and expert tips delivered weekly to your inbox.