power head and circulation

[paul wh]

ok well im at stage now where im the biggest sponge in the world so im on the suject of powerheads and circulation my tank is 320lt and before i rush off and spend my hard earned pennies (cents) on powerheads i think i should get some advise from you guys ok how ofter should i look to be turning over the water in my tank.
should i look for a wave action
how muck is to much wash power
is more better
what power heads are best
how and where is the best place to site them in the tank
ok that could be enough to start with
so let me have it

[Original Fin]

10-20X total sys volume/hr. Tailor it to the corals you intend to keep. Soft corals the least, LPS moderate, and SPS the highest.
Make sure to also factor in the flow from skimmers and any other filters you may have. It all counts.
Not sure if you have the same products we do, but wavemakers like Tunzes are great...SPS really thrive with them, however; they are pricey and take up room in the display. Seaswirls do a good job of creating random flow patterns. Stay away from anything that cycles power on and off to your powerheads. Almost none of them are designed to do this. Vortechs will do it, and they're incredible. You may only need one or two if you go that route, but again...pricey, and a lot of peple complain that they are louder than they would like.
Koralia style powerheads work pretty well on a budget. Maxijets probably give the most bang for your buck, but they are not always fish/invert friendly.
Closed loop is the best as far as getting a clean look and maximum flow at the same time, but this requires drilling your tank in many locations, a large pump(s), and as with all things involving the use of bulkheads, there's always the risk of leaking/flooding.

Hope this helps.

[paul wh]

thanks its a start so i have a 320lt tank so 6400 lt per hour is not out of the way ive seen tank when they water flow is massive and the corals adapt pretty quickly and some seem to do better the fish love it i thoughtthey would be blown away
so wave maker how do we rate them