At 24g, I wouldn't go above 40x and would probably try and shoot for 20-30x if you are keeping SPS. Lower for anything else. The 6025 would be at the MAX I would put in a 24g.
I had a 6025 in my 20H and it was WAY too much flow from one source. I now run two koralia nanos. They are about half the size of the nanostreams as well.