NT Labs Koi Care GH Minerals Up, Increases General Hardness of Pond Water, Maintains Pond Water Quality, Provides the Optimal Habitat for Your Fish and Other Pond Life,1.5kg

Used the whole bag over 3 weeks, fish seem happier and my GH levels look about right now.

Does the job and I like the look and feel of the resealable packaging used by NT Labs

A good service and a good quality product which corrected my garden pond water hardness in a very short time.

This has helped me keep my Koi and other pond fish healthy and fit

Started Killing in aquarium in in the same day, definitely bad batch, was using this product for years without any problems. Ingridients must be written on the label

Great product. Changed gh level to normal within seconds. Arrived quickly.

G.ood and easy to use product

A good product, but had no difference in working than products far less expensive