Question 2, water flow and designs for reef tanks

[vanreefer]

I have read multiple times from respected marine biologist types (Calfo et al.)that flow is second only to water quality in importance in a closed system. It makes sense really that in order to deliver nutrients etc that are in the water collumn you have to have good flow... I currently run a Dart on a CL with 4 outs 2 on the bottom pane of glass directed at the front of the rockwork and 2 on the back pane blowing behind the rockwork (soon to install the PVC rock rack)... return from the sump at about 900 Gph after head blowing at the surface for aggitation and finally a Tunze 6100 on a single controller... I notice way better polyp extention than I had ever seen when these corals were in my old 75 with way less flow (2 months ago)... furthermore I have the Tunze pointing toward one end of the tank and the polyp extention is greater on that side of the tank, which makes me believe that the corals are happier over there... time to ask the wife if I'm allowed to buy another 6100... oh and then a multicontroller... oh and then...and then... I wonder why i'm always in trouble??