will this lower my ridiculously high KH w/o the need to keep dosing my tank, but just the replacement water during water changes?

If you look on the container it states it converts KH into CO2. Your KH is what helps keep your PH from lowering, so in order to lower your PH you will need to lower your KH first. This acid buffer is mostly used in tanks with plants. That way they can remove the excess C02 from the water. Word of caution: if you don’t have plants, and use too much then you'll have a lot of CO2 which will cause a quick change in PH and will more than likely kill off any fish. An easier but slower way to lower your KH is by getting distilled water, using a reverse osmosis system or a deionization filter and doing water changes that way. It will take more time but works well as there will be no GH or KH in that water which means lower PH. Keep in mind if you are using tap water, the water may be high in KH and it won't help to replace with that.

Does this work on soft water?

This changes the PH, it doesn't matter if the water is hard or soft.

Seachem Acid Buffer 600gram | Desertcart British Virgin Islands

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

$74.58

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Description

🌿 Master your aquarium’s pH like a pro — no algae, just lush growth!

MASSIVE COVERAGE - 600g treats up to 3000 gallons, perfect for large or multiple tanks.
ALGAE FREE CLARITY - Phosphate-free formula prevents algae blooms and water cloudiness.
PRECISION P H TUNING - Gradually lowers pH with exact dosing for stable aquatic environments.
SEAMLESS BUFFERING DUO - Works synergistically with Seachem Alkaline Buffer to maintain ideal pH range.
OPTIMIZED FOR PLANTED AQUARIUMS - Specifically designed to support delicate aquatic plants and hard water conditions.

Seachem Acid Buffer is a phosphate-free powder designed to precisely lower and stabilize aquarium pH between 6.0 and 8.0 when used with Seachem Alkaline Buffer. Ideal for planted tanks and hard water, it prevents algae growth and cloudiness while converting carbonate alkalinity into available CO2. Each 600g pack treats up to 3000 gallons, offering professional-grade water chemistry control for thriving aquatic ecosystems.

Specifications

ASIN	B0006JLX88
Allergen Information	Abalone Free
Brand	Seachem
Brand Name	Seachem
Customer Reviews	4.7 out of 5 stars 391 Reviews
Global Trade Identification Number	00000116024303
Included Components	all
Item Form	Powder
Item Type Name	Aquarium Conditioner
Item Weight	0.6 Kilograms
Item form	Powder
Item weight	0.6 Kilograms
Liquid Volume	600 Milliliters
Liquid volume	600 Milliliters
Manufacturer	Seachem Laboratories, Inc.
Manufacturer Part Number	243
Model Number	243
Number of Items	1
Pet Type	Fish
Target Species	Fish
UPC	000116024303
Unit Count	1 Count
Unit count	1 Count

Reviews

M**.

Seachem Product That Is Some Help with Aquarium Water PH Challenges

Seachem Acid Buffer is a name brand for those trying to balance the PH in aquarium water. Water PH is not an easy thing to adjust and this product is far from automatic. Using it effectively still requires considerable understanding of water PH chemistry. Lacking that understanding will probably leave a user disappointed and frustrated, but hey, it's only a hobby. I suggest PH adjustments be tried without fish in the aquarium, and remember that it might just be easier to select fish that accommodate your water source.

4.06.2026

A**R

Produit de qualité

13.12.2025

K**3

Efectivo

Muy efectivo, baja el ph muy rápido

3.03.2019

V**R

Works quite well

Acid Buffer works quite well, mainly because converts the KH into Co2.

7.01.2019

A**E

Very stabil, no algae

Works perfect

20.12.2018

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

$74.58

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.