Can i use this in an outdoor koi pond 4,000 gallons? some koi have pox (i believe)

This would not be a good choice for a 4,000 gallon pond because a capful only treats like a 100 gallons I believe. You would need more than a bottle to treat that much water. I would use Prime made by Seachem which is available in larger containers.

Does Stress Coat soften the water? (Ca+ removal)

No it just makes it safe to add tap water right to you Display tank

Is there such a difference between this stress coat and the Tap water conditioner? Should be okay with just one of these to make the tank safe right ?

Both products are a type of water conditioner that makes water safe for fish. API Stress Coat has the added benefits of Aloe vera versus Tap Water Conditioner does not have aloe vera in it.

Used it once during big water change... corals closed up just slightly but used several other products at once so can't pinpoint exactly what it was. Recovered 100% in a few hours. I have urchins shrimp corals and a number of other inverts (anem)...anyway I'd use with caution but still consider it reef safe

Api Marine Stress Coat Saltwater Aquarium Water Conditioner 16 Ounce

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

¥6966

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Description

🌊 Keep your reef thriving with every drop!

TAP WATER DETOXIFIER - Neutralizes harmful chemicals instantly for safe aquatic environments
PROTECTIVE ALOE VERA BOOST - Rebuilds fish’s natural slime coat after stress or injury
SALTWATER REEF OPTIMIZED - Formulated exclusively for marine ecosystems to maintain vibrant health
TRUSTED BY AQUARISTS NATIONWIDE - Highly rated with 4.7 stars and a loyal community of marine enthusiasts
ESSENTIAL FOR EVERY WATER CHANGE - Use with every water addition or fish introduction to prevent shock

API Marine Stress Coat is a 16-ounce liquid water conditioner designed exclusively for saltwater and reef aquariums. It removes harmful chemicals from tap water and contains Aloe Vera to restore fish’s protective slime coat, ensuring healthier, stress-free marine life. Ideal for use during water changes, fish introductions, or when fish are injured, it’s a trusted solution with a 4.7-star rating from thousands of aquarists.

Specifications

ASIN	B0017JDIUC
Allergen Information	Apple Free
Best Sellers Rank	#31,498 in Pet Supplies ( See Top 100 in Pet Supplies ) #238 in Fish Medication & Health Supplies
Brand	API
Brand Name	API
Country of Publication	USA
Customer Reviews	4.7 out of 5 stars 638 Reviews
Global Trade Identification Number	00317163043851
Item Form	Liquid
Item Type Name	Aquarium Water Conditioner
Item Weight	0.4 Pounds
Item form	Liquid
Item weight	0.4 Pounds
Liquid Volume	16 Fluid Ounces
Liquid volume	16 Fluid Ounces
Manufacturer	Mars Fishcare
Manufacturer Part Number	385D
Model Number	385D
Number of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Fish
UPC	317163043851
Unit Count	1 Count
Unit count	1 Count

Reviews

S**H

Four Stars

Good

26.03.2016

S**Y

منتج ممتاز جدا ومتين

29.11.2025

V**N

Super 💟 good keep 2 on hand&get the the Zime

Most petsmart fish come out of Reno Nevada in a dark box for two days during the delivery the store treats them and then another move to your house. No wonder the fish need your help with api stress relief keep temp change equal to store keep fish in bag for 5 minutes to adjust temp if they get ick use the lifeguard all in one treatment or if you need to go cheapest way use Jungle Ick Clear remember to get a quart size cup to desolv

15.10.2020

L**N

Five Stars

Great price

31.12.2014

E**E

Works

Works helped my clown fish from stress

2.10.2026

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

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥6966

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

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

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago