I have a relatively new fish tank and I had a few odd questions. I have a 20 gallon long with a 50 aqua clear filter. I have 10 harlequin rasboras, 10 Pygmy cories, and 2 thick lip honey gourami. My first question involves water flow, because I have an oversized filter and very small corydora catfish I’m wondering if setting it low would be a good idea and if I need to worry about too little flow? My second question involves lighting. I’m having an algae issue so I lowered my lights to 6 hours and have a rest period in between. I have to do this manually and I’m wondering if the fish are bothered by the weird lighting times or if they even care. My third question is relatively broad and I wanted to know some good fish foods. I currently use Hikaru sinking shrimp pellets, omega one freshwater flakes and frozen bloodworms as a treat. Thank you for all the help.