Like I said it is still one of my favorite tanks that I have ever built, it was so much fun to watch cause it was active 24 hours a day. I plan I remaking it at my work, with a few changes but I'm not sure about the mixing. I agree that is up to the keeper and that your wagering a lot of money, time, effort and lives but I think with the proper research it can be done correctly, cohabitation is part of life. Just make sure no one is gonna eat each other...