depends what stand it's on really, if your concerned then you can get rubber feet to go on the bottom of most types of furniture which will stop them scratching.
I'd be most concerend about the weight of it denting the laminate, I'd put a sheet of wood down on the laminate then the tank on top of that.
You'll not scratch the laminate unless you try to drag the stand/tank across it. How often do you move the tank? It's not something you move to do the hoovering really.
Crush marks may be a more of a likelyhood (as previously mentioned), so maybe some load spreading plates would be the answer.
as mentioned above, i would be more worried about the floor warping if it gets wet, but you can use a laminate jointing compound on the joints to stop water getting underneath the boards, i used this in my kithcen from B&Q
ur all wrong except andywq lkaminate flooring may have warped like 20 years ago but now days its all processed in a way that it can take a good old drowning now and will always be fine tho can lose coloration if it happens to much easily sortable tho with floor vernish
yesh u may scrach the surface but only if u dragging ur tank over the floor whitch i doubt as ther heavy
water should not get under the flooring al ther all silicone sealed now day when fitted by experts or very tightly fitted.
so all in all u should be okay i know this as im in the flooring trade
depends on the quality of the laminate I've found, if you buy cheap stuff then yes it will warp and get damaged, buy soemthing half decent and you won't have any problems. i've laminate in my bathroom and ti gets drenched almost daily and hasn't warped at all.