ceramic media

I'm cycling a new nano tank (IM Fusion 20 Gallon), and I got a pack of Seaside Aquatics ceramic bio-spheres from BRS to put in the back of the AIO. The spheres just come in a mesh media bag from BRS tossed in cardboard shipping box. The media bag was in tatters too with holes ripped (or chewed)...

I recently upgraded to a 125Long, with the trigger system triton 44 sump. In my last tank I had some marine pure blocks in the sump. Due to an ick outbreak the tank has since been fallow and I’ll be waiting 3 months before moving any live rock or marine pure to the new tank. Is marine pure...