I just have some general questions about them..like what do they do, whats the recommended size for one...should you have one for every tank ..or just certain ones...? basically i would like to know ..everything thanks.
http://www.cpraquatic.com/products/bakpak.html here is a link that will show u some info on what they do and the different ones they have out there remember this is only 1 manufactur so this is the one I have seems to work ok but this is also my 1st salt tank so u never know?