The #4's should be fine, but if you can afford it, look at the Vortech MP40W. I have run Koralia's exclusively since the beginning, but finally tried the Vortech about a month ago now... All I can say is this unit far surpasses any of my Koralia's for flow and of course you have the ability to change things up with it. the programming in the Vortech lifted hidden filth from behind rocks and crevaces... I can say it works great!
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Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite)
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 2x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, 2X80W T5HO)
Type of Aquarium: mixed reef (SPS & LPS) with fish
Dosing: Mg, Ca, Alk
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