Stocking for 50 gallon tank?

[Navfish]

I’m planning to get a 50 gallon tank in a month or so (originally I was thinking 20 gallon long). But what fish could I put in there besides my

-6 guppies
-9 tetras

Preferably, I would like some smaller fish along with a couple of bigger fish….there’s just so many different types of fish but idk what to choose!!

Anything besides platies (I do not like them )

Could u guys give me recommendations of fish that you really like and would be hardy (like my guppies)?

 

[Colin_T]

What are the tank dimensions (length x width x height)?

What is the GH (general hardness), KH (carbonate hardness) and pH of your water supply?
This information can usually be obtained from your water supply company's website or by telephoning them. If they can't help you, take a glass full of tap water to the local pet shop and get them to test it for you. Write the results down (in numbers) when they do the tests. And ask them what the results are in (eg: ppm, dGH, or something else).

Depending on what the GH of your water is, will determine what fish you should keep.

Angelfish, discus, most tetras, most barbs, Bettas, gouramis, rasbora, Corydoras and small species of suckermouth catfish all occur in soft water (GH below 150ppm) and a pH below 7.0.

Livebearers (guppies, platies, swordtails, mollies), rainbowfish and goldfish occur in medium hard water with a GH around 200-250ppm and a pH above 7.0.

If you have very hard water (GH above 300ppm) then look at African Rift Lake cichlids, or use distilled or reverse osmosis water to reduce the GH and keep fishes from softer water.