We just bought a house with an aerobic septic system that is in the middle of our yard and we would like to disguise it, but were not sure what to do. Our best idea so far is to put a flower bed around it and cover with fake rocks and plant some grasses and possibly other plants with low root systems. We have two green lids in our yard that stick up 9 inches and 23 inches respectively. The second is so high because of the shaft that goes up where you put bleach in. I know that lid needs air so I am not even sure you can cover it with a fake rock. Thanks for the help.