hi all, found this site and thoght info was useful. ive had my tropical tank 10 mths now and have happy healthy fish. i bought it for my children but found i enjoyed it more than the kids. ive got a decent selection of fish and a hatchery with 30 or so platy's. i was wondering when the best time to release them into tank? they'r about 7wks old! i released the last lot at 5wks and they were eaten within the hour! worried the babies dont have enough room to grow... advice welcome !