I’ve had tanks for years and have always had cheato and about a month ago i started running my fuge lights 24/7 because my nutrients were high and to keep my ph up. I’ll tell you, I’ve never had such thick deep green cheato ever! The myth about cheato needing a dark period is just that. Buddy I got it from has been running his for over a year 24/7 and his looks the same way. Try it. You won’t regret it.