i don't own dicus but am thinking about getting some. so if someone could tell me what i need to know about them. i have a 30glong. filtation- whisper 30-60 hang-on with ugf/160PH already setup. which i was think about using. is that big enough? do they need to be in groups?how many so stress isn't a factor? compatible tank mates? i own few different fish cichlid's piranha's mainly so i do have a little experience with south american fish. use peat in my tanks with salt is that ok so if anyone could let me know what i need to know or direct me to some good information on them thanks in advance