Im very new to this whole fertilizing plants deal. At first i didnt know i needed co2, so i started doing DIY Co2, it helped a bit, but still got algae and not much growth and i would really like the algae to go away. Ive read that giving fertz will help the plants out compete the algae. Alot of people seem to use Flourish and Excel. But ive read that Excel is a carbon source, but if i have Co2 already do i need it? Also will these things kill shrimp, or is it safe as long as i stick to dosing correctly. Will i need any other fertilizers? Or can i get a nice clean aquarium with these Flourish products?