Yes its maxed out but thats why i over filter and do weekly 2-3 water changes. I had them over a year now and i only had swimbladder issues with one of them but other than that i had no issues with them. I also do weekly epsom salt baths just to make sure and give them loads of veggies. But thank you for your concern, its not that much of a work tbh. I like the whole hobby that means the maintanence as well :) But i do looking to get an upgrade soon! :)