OceanMouse

I had planned to add one species of fish at a time as I went along. I figured it'd spike the Ammonia if I didn't. I have a Java Fern and two Crested Java Ferns right now. I'm supposed to get a Crinum, Java/Christmas Moss, a Red Crypt, a Dwarf Sagittaria, Water Spangles, Hornwort, and Green Cabomba soon. The same time as the fertilizer and root tabs. As a substrate, I have aquarium gravel under a top layer of aquarium sand. Both from Petco and rinsed heavily before added. Do I need to keep the bare minimum group size for the Clown Killifish and Rummynose, or could I get a few extra? As for the frogs, I'm not planning on breeding on purpose. Really, I'm just hoping for it to all come together in a not horrendous way. My wife was wanting them more. Is there a way to get them, instead of the Rummynose? Would the Clown Killifish be the only ones in danger? I thought they were peaceful, except for fry

Everything I read said the Beta would be too much of a bully for killifish or other top swimmers. Or are females that much more docile?

I just got to see the video of your 20 gallon tank, and just wow. It looks great. Sorry to be asking so much, but how will I know when my tank is getting overcrowded? I assume at the very least the guppies will raise the population. Or if fish will school together like yours are versus being aggressive or stressed? Like if I could still add a couple Molly's or Lyretail Killifish with what I've already named, that's my wife's dream aquarium

Decoration. A relative passed away, it was her tank from high school, so I just leave it on. The tanks structurally sound Wow, ok... Then would I be OK adding Kahli Loach? Nothing besides the Bolivian Ram is a bottom dweller. Or using Cherry Shrimp instead of Bamboo?

I'm just now starting my first aquarium, it's a 20Gallon Long. Besides the pictures, I have six plants coming to spread throughout, and a piece of spider driftwood I was going to put dead center at the back of the tank. I was using this calculator to figure out how many fish I could add, and they still be comfortable, but it seems like a lot. I was just at 100% stocked with... One Bolivian Ram One Bamboo Shrimp Six Clown Killifish Six Guppies Four African Dwarf Frogs Two Mystery Snails Would that be OK? Or would there be a way to stock the Killifish, Guppies, and Frogs together, at least?