You don't want to use them unless you see signs of an inbalance, as they cause more problems than they do good when used uneccessarily.
neilanh said:How much lighting do you have on the tank?
mfdrookie516 said:the sword will need root tabs. It will also outgrow a 10g tank. As far as using ferts in the water column, it may or may not be needed. You don't want to use them unless you see signs of an inbalance, as they cause more problems than they do good when used uneccessarily.