It is better if you get your Beghia's in a container acclimate them and then put the container in the tank without the lid so that they will crawl out on their own.
Second you will never see them again and swear that you have been ripped off or they are all dead I am going through this phase AGAIN.
Very slowly you will wonder if you are missing any of your prized aptisa and slowly but surely then there is two and three and a hundred until it is a bad dash for the remaining few, and then they will start to appear on the glass. they glow in the dark with a good UV light like the kind looking for cat pee or the ones that Reefbrite sells. When you see them they are starving and if you are going to re sell them you better act fast.
I have two successful experience and going on my third.