Hi, I think you have a water flow issue : big leaved plants, a big stone in the middle ; your internal filter can't handle it ; that's why you have a build up of detritus ; btw , I don't know what substrate you're using, but your light wasn't strong enough for pogostemon helferi
Envoyé de mon SM-G935F en utilisant Tapatalk
Envoyé de mon SM-G935F en utilisant Tapatalk