angels and bettas dont mix, no matter what ever sized tank, cories make great tank mates, livebearers are often miffy, can work, can fail.you caould always try it if you can seperate your betta later.if your bettas pieceful, its more likely to work.neon and glowlight tetras are probally either too brightly colored for the bettas liking or will nip the bettas fins, black neons i have with some of my bettas, thay are the least nippest and dont annoy the betta.
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BettaBoy691 
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