So a bit of a feeler for now, but I purchased 2x 150mm RAM inline fans (brand new) to use as my intake fans.
However the issue is that my exhaust fans do not move as much air with the carbon filters attached, so the inlet fans are pushing too much air into the tents.
These RAM fans are powerful, even on the lower setting it is still too much. They are practically brand new, not even had these RAM fans on for more than 1 hours.
Ideally I would like to trade them for the Prima Klima 125mm 2 speed fans. Otherwise I am willing to sell them as I won't be making use of them.