Replying to Fish Tank Question

so i have a ten gallon fish tank, i currently have 1 rainbow shark, 2 red platys, 1 bamboo shrimp, 2 dwarf frogs, and 1 snail in it. I wanted to get some of the really colorful tetras called glowfish. about how many could i add to the tank? i know it's 1 inch of fish per gallon of water but i dont think that applies to shrimp and frogs does it? i also wanted to get an albino plecostomous (would get rid of it once it got bigger). probably gonna get people trolling in this thread so send me a message if you actually know because i need to know and +K if you do. Thanks.