I need some compatible fish/shrimp/frog/snail that can be compatible with a betta. But here is the catch. I don't have a filter in my 10. I want to make the tank look more alive other than just having Poseidon in there all alone. Any suggestions?
it is possible to have tank mates without a filter. you will however need lots of plants.
i would suggest look into OFL's NPT sticky. these are basically near ecosystems that will process extra waste. aeration will be a problem if you stock to highly for livestock that take in oxygen from the water.
personally I think a filter makes the tank look alive. with plants waving in the current, it can be quite beautiful. I only have one betta in my tank, but I dont feel that it's empty" or "boring" because there are so many plants to look at! an airstone might do the same job but air pumps tend to be pretty noisy compared to an actual filter.