1. Jun 10, 2012 #1
   

   Travis G Experienced Reefkeeper

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   So i have a 55 gal tank and im running a koralia 3 and a koralia 4. At opposite sides pointed at each other tilted upwards. The current keeps blowing my sand everywhere... do i need to down size my phs? Thanks all!

    
2. Jun 10, 2012 #2
   

   saltwaternewbee Inactive User

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   I would downsize ...I had to for the same reason. Another thing to try is angling the powerheads differently.opposite side of tank angle 1 towards front and the other to the back...one slightly up(#4) and other slightly down.

    

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