How & Why I'm Adding More Marine Pure To My Sump

[FishOfHex]

Going to be adding a bunch of fish over the next six months and due to not having a ton of rock in the MDT its time to start adding marine pure blocks.

 

[dragon99]

I've got one in my sump.

Brightwell also just released something similar if you like the Lego look:
http://www.marinedepot.com/Brightwe...ia-Brightwell_Aquatics-BW01680-FIFMBO-vi.html