mine were really well behaved , used to have the odd tiff with my blue acara altho it was more posturing than actual fighting. they never uprooted plants , didnt really dig a whole lot either . as for tankmates in a 125 youre quite limited in terms of cichlids . for smaller fish i had tiger barbs and corys in with mine with no issues . it could make for a nice display . corys for the bottom , tiger barbs will give lots of colour/movement and the jade eyes will be the stars of the show