I bought 4 amazon swords for my 100 Gallon. I changed the lighting from the zoo med ocean sun 10000K ( to bright white and brown coating over everything ) to zoo med tropic sun. dimmer, yellowish looking but no brown algea caoting. My amazon swords were 18-20 inches when i bought them, a lot of the leaves feel limp, torn small holes, and brown spots. ( my 2 onion plants are thriving ) How do i trim off the stems of the swords ? i was told to cut at the base diagonally. how many stems can i cut at one time to get new growth,? I have added the liquid iron fertilizer dosed to the 100 Gallon. how soon should i add another full dose ? Here is another question, I run a Magnum 350 with carbon & filter sleeve, will the carbon filter out the liquid fertilizer ? I installed the micron cartridge 2 days ago, no carbon, should i refertilize the tank with a full dose of the iron supplement while running the micron cartridge ( no carbon with that ) ?