API Stress Zyme Freshwater and Saltwater Aquarium Cleaning Solution, 30 ml

Have used this product religiously on my water changes and don't ever see that changing

It simply replaces all those starter kits as you can double the dose for a new aquarium to boost the biological filter. What a brilliant product! My guppies are happy with this.

Good value for money

Bit pricey but works for regular use

Been using this for years. No problems and does it's job in conjunction with API water conditioner.

Great product

Good

Love this product. Aside from being effective it is cheaper than others.

Producto muy recomendable!el agua no se enturbia para nada,hay que tener un buen filtro,el mio no funciona bien y el agua no esta sucia pero huele mal por el filtrado,el producto es buenisimo.

I love the brand

I was having some issues controlling nitrites. Used it, two days later, down to zero and stable. I don't see any issues with my Ph, fish, snail, shrimp and plants. I'll keep dosing the water as instructed.

My regular go to solution after water change.. this has helped my ponds as well as big tanks for maintaining good bacterial colonies in sump and canister filters

Very good