thanks, 
erm, yeah, its up to you mate, theres no right or wrong, just whichever one you think would be easiest for you and the fish you do, as i say, theres no right or wrong. Do you want to move them and then put sand in, and not move them or put sand in. the latter sounds easier but you have to think of the fish, as i say, i personally would remove the fish, but different people have different opinions, and (i think i speak for everyone here) i respect that.
erm, yeah, its up to you mate, theres no right or wrong, just whichever one you think would be easiest for you and the fish you do, as i say, theres no right or wrong. Do you want to move them and then put sand in, and not move them or put sand in. the latter sounds easier but you have to think of the fish, as i say, i personally would remove the fish, but different people have different opinions, and (i think i speak for everyone here) i respect that.