No back ground yet.....was hoping to get some coraline algea back there....lol. I am in the process of getting a sump built so most cords will be gone. For the moment i have a hang on back filter...it did ok until i got my diamond goby now he keeps my sand stirred up. I'm hoping once I get my sump in it will clear up more I have 48" T-5 lighting, 2 #4 powerheads.