I've been growing out a group of vieja for about 5 months now. I've got bifas, melanurus, coatzacoalcos, regani, argentea, briedhori & heterospilus. Bifas & melanurus have been the fastest growers. Coatzocoalcos, regani, and argentea about average growth rate. But the briedhori & heterospilus are really slowwww. They all seem to grow in spurts. You can look at them for a couple weeks and see no change & then overnight it looks like the put on an inch.
