I have pogostemon stellatus broad leaf which should display some red but it is growing (very well) all green. I have a 55 gal with 4wpg, dosing EI and pressurized CO2. Certain plants show red (ludwigia glandulosa and ludwigia ovalis), but others such as the pogostemon and luwigia sp. cuba growing just green. If a plant that should be red turns green, can it display red colors again? If so, how?