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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
API Aquarium Pharmaceuticals pH Control Kit - 30B pH Down 16 oz & pH UP 4 oz Freshwater Aquarium Water pH AdjusterAbout This Lowers pH levels in freshwater aquariums with a 16 oz bottle of API pH Down to help fish thrive. Raises pH levels in freshwater tanks with a 4 oz bottle of phosphate free API pH Up to promote fish health. Both pH adjuster solutions are safe for use with fish, plants and can be used when setting up a new aquarium. Weekly pH testing is recommended to maintain ideal freshwater aquarium water acidity for your fish. Over 50 years of API aquarium
About This
- Lowers pH levels in freshwater aquariums with a 16 oz bottle of API pH Down to help fish thrive.
- Raises pH levels in freshwater tanks with a 4 oz bottle of phosphate-free API pH Up to promote fish health.
- Both pH adjuster solutions are safe for use with fish, plants and can be used when setting up a new aquarium.
- Weekly pH testing is recommended to maintain ideal freshwater aquarium water acidity for your fish.
- Over 50 years of API aquarium research and products for easy fishkeeping and water quality maintenance.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1996 reviews
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Product Reviews
★★★★★ 1
PLEASE REVIEW — FORMULA CHANGED!!!
I wish I would’ve posted a review PRIOR to the formula changing but just know that I LOVED this serum. I’ve struggled with hormonal acne (PCOS) and eczema for as long as I can remember. Finally, last summer my dermatologist put me on (3) different RX including Spironolactone and Accutane. I was so tired so I stopped everything except for CeraVe cleanser, retinol (Tretinoin) and CeraVe healing ointment. My made up skin routine was working until I used too much Tretinoin and burned my face. I had read great reviews about this product so I thought, I might as well try it — and IT WORKED! I’ve been using this product for almost a year and I loved it. However, 3 weeks ago when I ordered it, I noticed the bottle had a green tint. I could tell after one use that the feel of the serum was different, more watery, not as thick as it used to be. The smell was also different. Still, I kept using it for nearly 2 weeks and I experienced 2 breakouts! Sure enough, I stopped the product and within a few days, my skin was back to normal. I am very upset because as someone who has extremely sensitive skin, this worked but unfortunately, the new formula isn’t for me.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Not greasy and no fragrance
Style: Updated Formula
Excellent moisturizer for my sensitive skin.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Great lotion for very dry skin
Style: Updated Formula
I had a laser done on my face and the products they gave me weren't working. This came highly recommended so I gave it a try. I'm very glad I did! It moisturized my face really well without appearing greasy.
I used the rest when my face got dry from winter (in th midwest).
Felt very rich and smooth. Medium thickness.
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Reviewed in the United States on December 19, 2025
★★★★★ 5
Helps repair skin barrier
Style: Updated Formula
This stuff is amazing! It has drastically helped repair my skin barrier. I had a flare up of dermatitis right before an important event and this helped clear it!
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Great Product
Style: Updated Formula
I will purchase this again. very gentle on the skin and moisturizes.
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Reviewed in the United States on February 14, 2026