Why do my fish keep dieing?

Humphead glass fish nead a 55 gallon,

angelfish need a 55 gallon

ropefish need a 55 gallon

royal pleco need a 78 inch lon 125 gallon

bollon mollies need a 20 gallon

2 dwarf gourami need a 30 gallon.

Some of these are very sensative fish and need a very well established and large tank. You did not even finish a fishlish tank cycle. And you added too many fish at once.

Too many fish, too much food. Keep in mind that most fish will continue to eat until they die. And excrete a lot. Feed in the morning, the usual amount. At night, feed half that amount.

Mollys need more room, dwarf gourami's are not strong swimmers, so they can easily get stuck in the filter, Angels are delicate fish, they can get stuck too.

In a 15 gallon tank, you can keep the dwarf gourami's as they don't get that big. But that is about all.

Your fish are probably dieing because you have, 2 potbelly mollys, Angel fish, 2 flame dwarf gourami, rope fish, kuhli loach, Royal pleco And a glass humphead in a 15gal tank.

In addition, you only cycled for 2 weeks before.

And you feed 2/3 times a day.

Definitely those things are wrong, maybe more stuff too .

A few things could be an issue, especially if you have never kept fish before. First, you are feeding them too often. Once a day is all they need to be fed. Even if the water temperature is correct, do you have test kits to test the PH and ammonia level of the tank. Some fish are very sensitive to PH and ammonia. I know Mollys tend to do better in brackish water, basically they need some salt in the water to be healthy. Angel fish actually are a schooling type fish, so it is always best to have more than one. Also, they are sensitive to PH levels, preferring soft water rather than hard. The loach is another fish that does better in a group.

It is because you have that many fish in a 15 gallon tank. The only of those fish that you can actually keep in a 10 gallon are mollies and the dwarf gourmis. You need a much bigger tank

Cycling takes more than 2 weeks.

Mollies need 30 gallons.

Angelfish need 30 gallons.

Rope fish need 50 gallons.

Royal Plecos need 125 gallons.

Kuhli loaches need 20 gallons.

Glass humpheads need 20 gallons.

Sounds like you need to return or rehome the fish and research what fish you can have first next time.