I got a tub of roaches 2 days ago. 500 for about $50, it's a lot of money in our currency. Well when I went to feed the dragons some roaches. All 500, Dead, eaten alive by ants. This is the second time this has happened. I put the tub in a little bit of water so they can't cross but it looks like they got over. How can I prevent them to get in there next time? So I have wasted $100 of my parent's money for the roaches to get eaten by ants. Help?