Well i have a huge algae problem cause my tank is right next to a window so i decided to reinforce my oto ranks(yesterday) from 3 to 6 and also added a young BN pleco well the 3 original oto have gotten lazy within the last month or so and just kinda sit around together in their favorite hiding place and i havnt seen them eating in awhile but everytime i see them swimming around they have full bellies so are they eating at night or am i just not checkin on them often enough to see them eat