API Stress Coat Water Conditioner 64 fl.oz, Pack of 2

I’ve used this product for years every time I add or change out water. Never a problem with my koi. They’re more active after use.

Great deal!

This product is great for my goldfish--especially when adding water.

I already use this product but the quantity is what I appreciate

Porkchop my 10 yr old red parrot head cichlid approves. I’ve been using stress cold for several years now and it does a great job providing a slime coat for the fish and declare and eyes in the water for instant use. Highly recommend

Great KOI Conditioner treatment

I have used this for years for my koi. Its probably the best product on the market for the cost for water replacement and start up for ponds and aquarium uses

Criminal activity here. Sending half-sized bottle twice, while charging for full size.

Great product and excellent price

Good value!