meny options,
reduced feeding...
RODI water.
water changes
reduced lighting
not cleaning your bio filters (leting ditrus brake down) (fueling effect)
cheimclean.
I did several things, to get rid of that....
that was 5 months ago... the red slime was in my main tank..
i installed a sump with 24 hour lighting, I slowly grew the brypsis algea, (that is 1 million times worse) in the sump over powering the long hard battle for the main tank..
I have slime aglea, battle'n out in the sump now...
the bryposis is a super strong, eazly grow aglae that i beleave is whiping out parts of the ocean... every time you touch it, it would spread. it need's nothing really to grow..
my levels are what i consiter to be great. 0,0,0, my tests dont detect, cause the bryopsis sucks up what ever's in the water and grows (fast)
If i were you (i hate saying that)
I would
be patient,
I would do more water changes (only if useing good clean 0 TDS water)
wont do no good if your adding water that contains Phospates and nitrate,
whats your water stats?
mainly no3, ph4
I would not add anything that you dont test for....
time will tell