A couple of suggestions on issues in this thread.
First the algae, that is nothing to worry about. It is the light causing it. When you do the weekly water change, use a sponge-type scraper to go over the inside of the glass where this forms. I always do the entire front glass--even though I can't see anything; if I don't, by next week I usually do see some algae forming. Getting it before you can see it is helpful. Using straight tap water (with a good conditioner of course) is fine for water changes now we've narrowed this down.
Second, the plant fertilizer. I would change from the API Leaf Zone (which is just iron and potassium) and use a basic complete (comprehensive) supplement. I use Seachem's Flourish Comprehensive Supplement
, but another is Brightwell Aquatics' FlorinMulti
. These are much the same, and contain all essential nutrients and in the correct proportions. Once a week, perhaps twice a week. You use very little so they last longer than the API will at the recommended doses.
What is the GH of your tap water? This is an important source of the "hard" minerals like calcium and magnesium. You can ascertain this data from your municipal water supply people, they likely have a website.
You have some fast growing plants, so the suggest fertilizers will make quite a difference.