DI Cartidge -- What happened?

[Whys]

I have a DI cartridge I bought about a year ago. Guess I didn't need it yet. Now I do tho and something is odd. The small blue and brown pellet powder inside has reduced to about half its original volume. It hasn't solidified or liquified or anything that I can tell except volume. First, what the heck? Second, can I still use this thing?

Thanks in advance. :)

[ccLansman]

Was the media exposed to the air? Bulk reef supply says their vacuumed sealed ones only last 2 years that way, so once opened it most likely depletes rather quickly.

[Whys]

huh... well now that's interesting to note, because I'm pretty sure it was sold to me out of the sleeve. To be fair tho, they probably thought I needed it right then.

Okay, need a new one! Thanks. :)

[zigzag1]

I've had a couple of re-fillable DI cartridges do this (become less than full during use) when I rerfilled them myself and neglected to pack the media in the cartridge tight enough. When I took care to pack the DI media in the refillable cartidge tightly, it was not an issue. GL!