what do i need for a yellow polyp. what supplements? the lights i have are 100 watts. they are cool white and are 6500 kelvins and i have two they are compact flourecent and u-shaped is that enough light for some polyps in a 20 gallon aquarium?
Unless you're TESTING for it you don't Supplement/Dose for it. Your routine (weekly or so) water changes will replenish your trace elements. Keep your water quality up and your new corals will love you for it.
