I have heard reefers using the following method:
If your DSB is say 4" high, chop some PVC that's about 4.5", drill some holds so that water can circulate inside and out of the PVC, stick those PVC vertically into the DSB and then stack the LR on top of the PVS. This way, water can circulate in and out of the PVC and under and around the bottom of the LR too. The LR don't even have to touch the DSB and you will have min. contact point between the LR and the DSB and max. water circulation.
Has anyone try this before? It will be great if someone could post some pictures of such a aquascape tank. If you use this method, I have a question. Since all the LR are stack against the PVC, all the pressure points are on the PVC and since the PVC is relatively small in diameter, the weight of the whole rock work will be against those certain PVC contact points where the PVC and the tank bottom meet, will this create any ill effect for the bottom of the tank?
thanks!
david