Well there are several issues with this;
1. You would blow though granular to fast
2. Putting tablets in would change the dynamics, I'm certainly not a chemical expert but from talking to the guys at king they say that their bromine is "activated" and does not need to be activated through the use of shock like the tablet form does. Shock in there system is to do a burn off.
3. I believe there is some legality to it, as it is a trademarked item. I don't know if this effects a private individual however I would not post it open on the forum.
4. Do you really save that much after you buy the bromine, pry the bottle open, measure things out and get it all back together? I have to admit that I pulled one of those bottles apart to see for myself what was there and it wasn't that easy!
Your ingenuity is admirable but for the cost of the frog bromine already in the bottle I will just buy that and slip it in place, it’s convenient. I kind think that’s the whole point of it!
together?