oh heaven and algamic are both very important part of the set imo,
heaven gets you an increase in the nutrient uptake of the plant and gives it extra energy!
algamic is a concentrated mix of seadweed actually it stimulates the vitality
my advice is never go full stength with bio grow always consider 3/4 as it really do tends to N tox quickly as far as i can tell if you go full dosage with autos and even PP
i actually found it usefull to go low on bio grow when going into the flowering stage because the plant somehow gets more sensitive and maybe dont need that much N at that stage because you add bloom and topmax too you must handle it right.