with Rallysman...some plants and lots of water changes for nitrates and I only use carbon if I have to remove meds from the water, which isn't often. i havent use carbon for years.... even when i have medication... i let the 24/7 water drip... dilute away....toxicfish said:carbon should be changed every month b/c it don't last long and gets gummed up very fast....
I myself don't use carbon