Provide you run each LED at one ampere.
Otherwise you will not be getting 5 w of light from each 5 w led.
To run each LED at 1 amp you need a very efficient heat dissipation heat sink
otherwise the heat will shorten your LED life badly.
Oop I do not have skimmer. I using Algae scrubber, Bio pellet and Rowa. I dose 6 ml of MB7 daily and 5 ml volka weekly.
Water change 5 % every 2 weeks
No red slime but a bit of hair algae