Personally, I would go with the MP10 wes adding to your existing flow ($299) Yes, you can’t aim them but they are also more of a broad flow, and like you said controllable. If you going to add a RK lite and more Koralias it will work out to almost the same cost. The MP10’s are cleaner looking and no heat in the tank, having the motor on the outside. Bang for your buck, the Koralias are better, but not nearly as nice looking. In a small tank the less equipment you see the more your eye is drawn to the live stock. In a big tank the bulky PH’s don’t look as bad as they do in a smaller tank. Feed mode a nice feature with the vortechs as well.
I have 1 MP10, 1x 750gph Koralia, 1x 550gph Koralia in my tank 30”x24”x24”. As soon as my vendor gets stock in on the MP10’s I will be adding 2 more and dropping the Koralias. Not one cord in my display after that, nice and clean looking.
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