I have a 20 gallon tall tank that i have had setup for lake malawi cichlids for the last 2 months and would like to ask if im going to run into huge territorial problems later in time. The tank is setup as follows: Blue/green gravel mix about 1" deep with 3 six inch diameter pots stacked into a pyramid in the center and then 1 3" pot to the left and a shard of another to the left. It has a Aquaeon 30 filter pumping at 200 GPH with several bio balls in the back of it along with a small bag of crushed coral. 2 Potted aponogins that i grew from bulbs both potted in the tank. (cichlids seem to be leaving them alone) THe tank is stocked with 1 yellow lab 1.5", 1 female kenyi 2", 1 Male Red Zebra 2" and 1 bumblebee cichlid 2+". Im doing about 25% water changes every week and am prepared to up that as much as needed in the future. I add tetra easy balance Nitraban to help with the bioload. I will add that everyone seems really happy in the tank and i haven't seen major fights just the normal clashes over food you see with all fish.