last week i started dosing iron for my plants...its a 29 gal tank...2 20w light fixtures...i added 3 drops last sunday and 3 drops on wednesday...the species i have that was showing iron deficiency symptoms is hygrophila polysperma...after the iron the new leaves that were kind of yellowish in color turned kind of red/rusty color and now they have 2 new sets of leaves that have grown...i have the nutrafin iron test kit and after an hour of adding the iron it shows 0ppm...im also having an algae issue...the driftwood has started to get covered with green algae and i spotted some blue/green algae on the gravel....i dont know is its because of the iron or because of the extra light fixture i added 2 weeks ago ...how can i solve this algae problem? TIA