My amazon swords were doing great for the last year. And now all the new leaves that come in are a very pale green almost white color. I dose weekly with Kent freshwater plant growth. And i have a diy co2 hooked to a power head. The lighting is 130w power compact and the bulbs are 6700k. The bulbs are changed once a year and they are 3 months old. This is the same system as always. I have also been getting some ABA algae as well around the filter inlets. What is the problem? iron deficiency? needs more co2? Needs a different fert. ---------------Is excel flourish good.------------thanks alot for the help