About 2 weeks ago I bought 8 BGJD and 3 EBJD's and have them growing in a well filtered 55 tank. The EBJD are about 3/4 to 1" long. The BGJD are not as big closer to 3/4. They all have plenty of space right now to grow. Just wondering what size they should were I'll have to separate the blues from the BG's. Here is a link to my setup and project. Thanks for the input. http://etnac.com/jack.htm