Hi, Welcome !
My advice is research your fish a bit more.
Your Bala Shark needs a group and a much bigger tank. They hit 12" and grow fast. Think giant Minnow.
Watch out with your Bettas, they typically fight each other and most people only keep females together. YMMV
plus they often get picked on by faster fish in community set ups.
I see at least one Penguin Tetra
(Thayeria boehlkei) they are larger Tetras and hit 3"
Your 3 spot Gourami may stay nice or may get Nasty as it gets larger.
You can measure your tank and find the size in gallons.
Your Frog may do better in a small tank with a couple other frogs. He may have a hard time competing.
Common Plecos typically need about 125g or bigger tanks. They live years with decent care.
When you are ready to try live plants give us a shout
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