I use Seachem that doesn't have water added to it and has more nutrients than the aqueon. Aqueon has water added to it, I dose 10 ml a week, aqueon wants 10 ml per 10 gal, Seachem flourish comprehensive is 10 ml per 60 gallons.
edit : flourish comprehensive is 5 ml per 60
Aqueon plant flood has
98.5% Deionized water
Also comprehensive has way more ingredients in it to make a long post short, your best bet would be to switch to Seachem flourish it will save you money in the long run, don't fret over the diatoms they aren't harmful just an eye sore, I see your light looks very bright what is your lighting?
Sent from my SM-G930P using Tapatalk