My mbuna's did not bother any plants for several months one of my favorite and oldest plants a indian red sword I accidentally ripped a leaf vacuuming so the fish got a taste of the plant and shredded that thing in a day, other than that no plant issues.so far my mbuna's have not touched my plants.. i have amazon swords, crypts, melon swords and Alternanthera reineckii 'Mini in my 75 gal.
I just got my 1st F1 pair wild caught there in there own tank its amazing how much more brilliant and lively colorful this wild fish is compared to my other commercial raised healthy fish