I thought it was as simple as dumping in the ammount of dry GH booster into the water, during water change, and break it up (stupid stuff clumps) to let it dissolve.
Well, apparently this stuff likes the bottom or something.
The first time I did it, it seemed to burn a few cories (one died).
Second time I did it, I was more careful in 'spreading' it, and trying to dilute it as it was spread around the tank. It killed 4 remaining cories... and a random catfish that has been in the tank since it was new.. he survived so much, No one could identify him, and he had grown from around 1 inch to 2 inchs since I had gotten him. All while almost NEVER being seen. (I would always think he was dead, and then he would show up when I moved something ).
How the heck can I dose this stuff? I only have 1 remaining 'original' in there, and hes a BEAUTIFUL red tail shark. Perfect canidate for me to burn the crap out of him and kill him.
Can I just dump the powder into the filter on the back of the tank? I presume not...