just push some root tabs in close to the swords and crypts and then add the fertiilzer straight to the water column. The wisteria and anarchis can absorb through roots they grow but they do much better with it in the water column.
You shouldnt get algae, just add once a week, if you see any algae run your lights for less time, though TB I run my lights for 12 hours a day and havent had any algae issues. Algae wont grow unless there is too much of something so if you get algae you either need to add less fertilizer or use less light. :)