Haveagojoe
Fish Crazy
I've read a lot about this stuff and want to give it a go but theres a question I can't find the answer to,can it be put in an internal filter? I know your supposed to put it in a little bag thats supplied I think, but I've got a Fluval u3 internal will it go in and how? do I have to leave one of the sponge pads out or the bio media,any help would be appriciated. 








