Hi, I was thinking of adding some crushed coral to my FW aquarium to help raise my alkalinity. Are you supposed to crush the coral into a powder or just into chunks? I was going to put it into a media bag and place it in my filter. If it's down to a powder it would obviously escape the bag and would probably make the water cloudy, so I wasn't sure if that's the correct way or if you put chunks in there to slowly dissolve it into the water.