Ok, those are all just your opinions, show me facts. The only thing you said that is true regarding this product is that it doesn't help with the nutrient problem, it's an antibiotic, which is a poison for Cyanobacteria, and an effective one. It sounds like you've experienced an overdose. I'm not arguing with you about this anymore. I can agree to disagree, but your attitude regarding this is rude, disrespectful and narrow minded, which is the problem with these web forums in general, a vocal few spouting misinformation, or making freak occurrences sound like the rule. I'm just sharing my knowledge and experience not trying to bash people's views and opinions. Just search this forum for chemiclean, you'll read hundreds of positive posts of people reccomending it and people using it. I have yet to read one where it killed the tank. I'm sure you can dig something negative about it up. I don't care. Everything you add to your tank is a calculated risk, the food the water , salt, anything is a possible contaminate " or poison " as you put it, usually the difference usually between poison and cure is the dose. Like I said I'm done.