The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
If you got Eco complete that was packed in water and says it had bacteria in it and would cycle a tank fast, and you just leave it sitting, then those bacteria will die off within a day or two. Then you will have to cycle from scratch. The bacteria need fish waste to live on, or pure ammonia to live on in the absence of fish.