Are rams a good choice for my tank?

If the other fish are peace full, and not overly active or rambunctious, then it could work. But check your Ph. Rams are more sensitive to Ph than a lot of fish, and may not adjust to a Ph too far out of their ideal range. and that is pretty low, evan lower than 7.0.

Testing the tank with test tube kits is the only way to be sure what the levels are. You might want to add live plants to eat up some nit ate.

They should work, but as Noseless suggests, check your pH and water hardness. Rams prefer softer water and a lower pH, and unlike many fish, are actually sensitive to these things.

Nitrate level, yes that's important too, but you need to test the water to determine if you are doing enough water change. Gut feeling is you will be fine at that amount, but it depend on how many fish, how much you feed them, and how much nitrate is already in your tap water. But if those 2 changes aren't controlling the level, well you probably shouldn't be adding more fish.

Ian

in my opinion, that would make a great addition. They all seem like peaceful fish. I'm not sure about the barbs. Usually barbs are pretty aggressive. If they are not aggressive, the rams would do well. Like you said, you need very clean water with many water changes per month.

hi, What the guy above me suggested is real, maximum possibly your fish have been given under pressure from the danios. i in my opinion might rehome the danios to somebody who already has a minimum of two, then the two get 10 neons or 8 cardinals, they do properly with blue rams as they are incredibly calm little fish. Angelfish may well be greater effective off in a 40 gallon tall tank, as they get to be approximately 5-6" and that's deep besides as long.