I built x5 Mekanism ore processing that I wanna use to process about 7 kinds of ore. But there is one problem. Sometimes it remains only small amount of slurry (lower than 200mB) and I have to use Gauge Dropper, because next Slurry in tube is not Iron but Tin for example.

This has been reported in the past and definitely is on my agenda, but right now I'm focusing entirely on bugs that are preventing me from getting a 1.11 release out. In the meantime, this can be avoided by isolating your slurry processes by resource.