What fish to buy for my tropical tank?

OK. Well, you'll need at least 6 Tiger Barbs to deter aggression issues. You've got a good amount of space, so let's go with 10 of them.

Along with your Barbs you could keep something along these lines:

10 Tiger Barbs

1 Blue or Gold Gourami

6 Corys

Perfect!

Or, you could drop the Barbs down to 6 and stock with:

6 Tiger Barbs

5 Boasmani Rainbowfish

1 Bristlenose Pleco.

Something along those lines.

Whatever you choose, be sure that you fully understand and have completed the nitrogen cycle before you bring your fish home.

Good luck.

Tiger barbs can be aggressive toward other fish. Especially if they have long fins like the sword tails.Tiger barbs are notorious fin nippers. I would make an all barb tank with some chase fish in there like the large zebra danios.

I would avoid mixing live bearers with other tropicals. Live bearers benefit from a high PH and adding aquarium salt to their tanks.

There are lots of small chichlids you could add to the tank that would not take guff from the barbs.

180 litre is 48 U.S. gallons so that's fairly good size, you can keep a maximum of 10-12 tiger barbs. If you want to keep them with other tank mates, maybe get only 6 tiger barbs. At least 5 of them as they are schooling fish and semi-aggressive. Some good tank mates for tiger barbs are zebra danios, other barbs like rosy barbs, larger tetras like buenos aires tetras, black skirt tetras, or even sword tails and platies. Just remember not to overcrowd, because tiger barbs are semi-aggressive so they can get a bit mean. As long as they are in a good school number and aren't kept with slow moving fish with long flowing fins, you'll be okay. I used to have them in a 55 gallon fish tank like this, 12 tiger barbs, 6 zebra danios, 1 opaline gourami, and 5 albino cory cats.

You could have about 12 adult tiger barbs in there.

What i think beacuse its a new tank you dont want them dieing straight away.

If your a starter with tropics get.

10 nenons.

5female guppies

2male guppies.

1 placo.

apple snail

Once you have guppies you will never need buy any agien, they give birth every 28days and give birth to 5-50babes

there live birth.