Api Stress Zyme 8Oz - 237 ML - For Aquarium Maintenance - Fish Aquarium, Multicolor

A great product from API. It helps to create the beneficial bacteria in no time.

I cleaned my Aquarium filter too well recently, as after this I started to get an immediate build up of brown algae. Then added several doses of this product and it prevented the return of the algae in a very short period of time, so well worth the expense and will definitely be buying again when needed.

Tastes terrible, gave the servant a glass and she spat it out! Right into my fish tank! She hasn't been out of the cage all week, fish seem alright though!

I was sceptical at first as it's hard to prove that it was doing much as I began using it after resurrecting a tank that was left to wallow by a colleague. How does one know which of the cleaning products and techniques are keeping things clean?I recently ran out of this and it’s taken me about a month to get round to getting some more. In that period the tank hasn’t turned into a jungle but I have noticed that it is slightly dirtier than when I was regularly using this.The cap has a built in measurer, I use a cap full once a week on a medium 50 litre tank with 1 goldfish and 3 snails in. Combined with regular water changes this product keeps things nice and clean, and even when I’ve missed water changes – using this helps maintain a reasonable level of cleanliness.It’s priced the same on here (£7.98 at time of writing) as the smaller bottle is in my local pet store so no complaints there.

I add this to my treated and denitrated water before I siphon the water into my pond. Although I can't directly ask the fish how they are feeling, Stress Zyme clearly benefits the water quality and boosts the beneficial bacteria that live in the filter.

Have always used this to help with aquarium water quality. Seems to be doing the job as quality is good and fishies are happy. Possibly it helps with extending filter cleaning.