don't leave them for more than 30 minutes in the viv..take them out and put them in the fridge...they will last in there for about 24 hours any longer and they start to have some nasty germs growing in them that can harm your leo..they also start to smell pretty bad!!
that is a bit of a while...if it's pretty warm they are probably not too good..if not so hot then should still be ok but i usually thaw mine then feed once thawed....longer you leave them the more nasty results they can have...
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