I have 4 sailfins, the tank is well planted and plenty of hiding spots. On my water test this morning my KH was 6d and my GH 4d. I am looking for mid and top level fish.
You ave very soft water for sailfin mollies Oinkerz. Mollies tend to be mostly top and mid level swimmers so I do not understand your desire for more of those. In your situation, I would not look for sny more top or mid level fish, instead I would be looking for bottom swimmers like most species of Corydoras or things like Kribensis.