It says it does :roll: My friend is testing a similair product at the moment for a manufacturer. And if you tank is kept in a living area and you choose to use it, you will no longer recieve visitors as the smell is horrendous.

 

I've used it 4 times, 3 tanks and one mini-cycle. Worked all 3 times. Overnight no ammonia and nitrites present. No fatalities during cycling, and the tanks never smelled bad...

Look around on this forum and you'll find mention of it a few times. I am a devoted used. Make sure it's in the fridge and it's bought from a reputable FLS with a high turnover, so it's fresh.

 

I agree with Susan. Works like magic and it doesn't matter what kind of fish you stock.