sump filter stages...

[aquaherper]

How about putting crushed liverock from a sw tank as the final stage in my sump I'm building for my fw? seems like it would be a great bb collector ?
Any input??

 

[Joeysdiscus]

Yeah it would be fine if you don't have the money for new bio media but it will higher your ph and hardness of the water so as long as your fish are fine with that it will work.

 

[J.Mcpeak]

Pond media, bio balls.