Washing nappies in hot hot water does that shrin & using tide with bleach alternative

[mommyandbaby]

I thought Hot hot water would shrink nappies I hear epople way use hot hot water in the laundry matchine or pour boiling water into the washer is that safe I have Blueberry snap sides and I dont want them to shrink..
How about Tide with bleach alternatives? It says don't use bleach. Is that safe?

Do not use bleach. This will cause the diaper's fabric & elastic to prematurely deteriorate.