Can I use a fan on a Liquid Cooler not supplied by the LC's manufacturer? I can't find a radiator with a decent score that includes RGB.
Yes as long as it is the same mm
can you define static pressure?
Static pressure fans are specifically designed to tackle installations with heightened impedance and resistance. Radiators and case meshes are becoming more common in PC builds, which is where static pressure fans have been marketed towards.
Look for fans with good static pressure, and match the same size as the radiator.