Koralia Evolution - two 550's or 750's

[muscle]

Below is my current and eventual setup. I want to add a powerhead to each back corner of the tank to keep fish poop suspended. For those who have used the Koralia Evolution's, would you add two 550's or two 750's to accomplish this?

Current setup:
75 gallon
Aquatop CF-500
AC 500
two Hydro 5 sponge filters
bare bottom
one Flowerhorn

Eventual Setup:
75 gallon
two AquaTop CF-400
two Hydro 5 sponge filters
Sand
one Flowerhorn

 

[epond83]

I have one one of the older Hydor Koralia 1 in my 75 gal, not nearly enough flow, they are high flow low pressure. This is great for wide flow but need to up the GPH to get enough pressure to move debri. I haven't used the new ones so that's all the help i can add.

 

[muscle]

Thanks, epond83.

Anyone else have experience with these pumps?