Re-thinking flow in my tank.

[pjr]

Hi folks... I am having second thoughts about the flow in my tank. The setup has been running since Jan 2005, so obviously it doesnt work

Tank is a 6 foot long 130 gal (24" high, 18" front to back). There's a pair of corner overflows; the return is an iwaki 30.

I've used several pumps for flow over the years. Currently using just a single Tunze 6105 controlled by the Apex. In the past I have used a pair of 6080 streams, as well as a controlled 6100 paired with a Maxi-mod 1200.

All the combos seem to move a lot of water. However, my sps, which grow well, their polyp extension does't seem to be that great.

The iwaki is relatively quiet, but I have come to think that there is a lot of vibration in the tank. Fish seem to hide unless the pumps are off when I have put the Apex in feed mode.

Sometimes I think the setup would be better with no sump, some big streams, and a good HOT skimmer. Or a little Quiet One pump for the return to just trickle the water back in.

Open to thoughts...