Live rock

[andresont]

Originally Posted by Rene

I'm looking to buy some live rock. What kinds of things should I be looking for in my rock? How can I tell if its good rock?

As others indicated, I would recommend
1. new rock , the freshest out of the box is the best because you need clean, pest and chemical free rock. what ever life that is still there will die off anyway while your tank will be cycling
2. Porosity is important for bio filtration
3. Shapes, if you get lucky your box will have cool shapes but PVC structure was always good way to go
4. You only need 30% of live rock or less of the tank volume, if you get more you will need enormous water flow to penetrate this brick wall of live rock in order to get a decent flow. If you get less you will have reduced bacterial bio mass. Dense rock will support less bacteria and you will need more of it which leads you back to reduced flow problem.