The Maxigro and Flormato are two different product lines by general hydroponics. Flormato is a stand alone
nutrient for continuously fruiting plants (like tomatoes, squash, and peppers), thus it's formulated for all stages of growth of continuously fruiting plants (plants that grow both foliage and fruit at the same time).
The Maxigro product line separates vegetative growth and blooming stages into two different formulas. This is more for plants that grow vegetation in the beginning, then in the last stage grow fruit or bloom (like broccoli). Or plants that you don't really want to bloom anyway (like lettuce, green onions, and spinach) where you want it to focus on growing only foliage (then you would only use the grow formula the whole grow). You can also use it for continuously fruiting plants if you want to get the plants to focus more on foliage in the beginning (using the grow formula), then switching to growing fruit (switching to the bloom formula). But neither the Grow or Bloom of the Maxigro product is specific for continuously fruiting plants. Long story short, if you are growing continuously fruiting plants, the Flormato is all you'll really need.
I use about 5 mL (1tsp) H2O2 (standard 3%) per gallon of water in my systems once to twice a week. Though I have been known for using as much as 10 ml, or not really even measuring, and just pouring some in for older established plants. I just dumped in about 3/4 to 1 cup of H2O2 in my pepper reservoir today (20 gallons in that reservoir). One cup (237 mL) is about 12 mL per gallon in a 20 gallon reservoir. The H2O2 not only adds dissolved oxygen, but helps keep disease and pathogens at bay. So for me I use it for both reasons. I buy it at the dollar store 4-5 (32 oz) bottles at a time. I now also use it for a lot of other things like cleaning dish sponges (soaking it overnight). I used to heat the sponges in the microwave to cook the bacteria, but it would sometimes melt the sponge. The H2O2 kills the bacteria and without damaging the sponge.