60g Cube flow issues

[10Seconds]

I have a 60 gallon cube reef and I think I am having flow issues. My fish only hang out on one side (the left) of my tank. The only power head I have now is a little cobalt pump, so thats probably some of my issue. Looking to add a couple MP10's since they seem to be popular and I can control with my Apex. But where should I put them? Here is a pic of my tank for help deciding. Sorry I have only been into the hobby for about a month now (though I have had the tank for about a year and a half, just didnt get into it and barely maintained it), so I am still learning.

I am thinking one on each side of the return on the back glass? maybe one lower and one higher?

 

[Heliarc19]

Can't help with mp's but I really like your aquascape!

 

[FLAdaboy]

I have 2 Wav pumps. They are tuned down but I have a lot of flow due to my tank be SPS dominant. One pump on the back and one on the side glass. I don't have sand so it helps with higher flow.