Just have enough filtration to handle the bioload. Alot of people in here will bash you for leaving fish alonr during the day. Pay no attention. Learn from other hobbyists and increase your filtration. Possibly add a UV sterilizer a a precaution as well. Ive learned on this site, no matter what you post there are those who feel they have to criticize. You'll figure out who they are. By the way, your tank looks great. I keep peaceful south americans, geo's, chocolates, BA tetras, etc.