I have a 29g bowfront glass aquarium with 150w stealth pro heater, coralife digital LCD thermometer registering a constant 79, sand, driftwood, 4 silk plants, penguin 150 power filter, 6 albino Cory catfish, 1 female veiltale betta, and perfecto canopy with 17w fluorescent light, which I keep dimmed for the cories, they seem to dislike the light. I was wondering what my options are to add next. Or am I already fully stocked? I was thinking Mickey mouse platies, but read that they like densely planted aquariums, which mine is lightly silk planted. I could add more silk plants, but live plants are not an option, except for Marimo which I plan to get. Sp do they really need live plants to thrive? If not how many should I get do they prefer groups? Also how many female and how many males? Thanks