Super glues come in different thicknesses. Other than that there's not much else you need to worry about for what we use it for. Brand doesn't matter, they're all
made the same. Thin is very thin, like alcohol. It will work for mounting corals, but you can't put it one one piece then try to mount it underwater. Thick, or gel is best because it will stay put under water and has a longer working time. You put a glob on a coral or rock then place it under water and it will still cure.