Only 1 is currently filtered, and it's the heaviest planted; also, it's the community tank, so a lot more bioload than the others, which all house single bettas. But, I have a couple filters I haven't installed yet, and I think I want a couple sponge filters for the others.
I just recently bought root tabs for a Sword that was looking sad, so I'm using those in a couple tanks, and I'm thinking about getting some liquid ferts because I have some hornwort that isn't doing so hot right now...
But I'm super low tech, no cO2 for me. I did see a little cO2 kit at petco today that intrigued me, but I'm not gonna mess with it lol.
The only cure for ignorance is education, and bullying or attacking someone is no way to educate them.