Bests & Worsts Reviews from Amazon

I just want to start by saying that I am an experienced fish keeper and that I am in no way, shape, or form new to the fish keeping hobby. That being said; I purchased this product to clear up an algae problem that I was having in one of my tanks. I've had this particular tank for a year now and all of it's inhabitants are the original fish that I had purchased when I set up the tank, everyone was happy and healthy in the thank & I've literally never had any issues with illness etc. (aside from the occasional algae bloom). This tank has 7 neon tetras, 1 cory cat, 1 crown tail betta, 2 adult balloon mollies, and about 20 of their fry (who were approximately 4 months old, big & healthy, & about to be transferred to another tank). When the item arrived I carefully read the instructions and verified that the label indicated that this product was safe for fish and plants. I also made sure to look at the label to see if there were any specific fish species that were listed that could not tolerate the treatment and none were listed. I did water changes on all of my tanks Saturday morning and treated this specific tank with the appropriate dose for my tank size as indicated on the label. I spent the day running errands with my family and then later that night I turned all my tank lights off for the night ( not paying too close attention to the fish while doing so). I woke up on Sunday morning and flipped on my tank light and every...single...molly in my tank was dead. Both adults and ALL of my fry, it was awful! I spent my morning fishing dead fish out of the tank before my 3 year old could get up and see what had happened. My tetras were lethargic and my cory cat was barely moving (the only fish that didn't appear to be affected was the betta). I figured that I had lost them all and just turned the tank light off and left the tank alone. Monday came along and my tetras were completely transparent but still alive so I did a 98% water change and by Tuesday the tetras had their color back but my cory cat had died. Today the tetras are almost all the way back to normal (aside for one which is for sure dying) and my betta is fine. This product had some good reviews on here and I like to think that I am a well informed buyer when purchasing products for my pets but this is the absolute WORST purchase I've ever made. I would give it -5 stars if i could. After disaster stuck I did some research on the product and it indicated that I am not the only one that this is happened to. This is the 2nd review that I've left on anything ever but I wanted to take the time out to share my experience with this product and urge you to pass this one up and keep looking. I feel like if just one person has had this experience with this product (and I know i'm not the only one) that it's not worth risking putting this in your fish tank, so hit the back button and find something else for your algae problem because this isn't it!