As much as you think looks good. Take a look at the past issues of ReefKeeping online, and look at the Tank of the Month features. It might help you get a good idea about the reef type look you want.
For example I have a 180g display with about 200g total volume. I have about 80 lbs of rock in my system. Some people go with less, some with more. The point is for you have good biological filtration. Try to look for porous rocks, and rocks with a lot of surface area for the beneficial bacteria you need in your system. Try a couple of rocks, place them and see what you think. If you need more then add it, if not, leave it.
Have you thought any into sumps, or refugiums? Both are great options to add extra rock for more filtration without cluttering your display.
|