Hello
You can definitely raise the micro biology of your soil over the grow. You can add microbes type products like mammoth P, great white(same brand as orca), and orca too. Any of this are a good addition to any grow. You can feed them with most organic fertilizers, but fish hydrolysate, kelp , humic acids.
There isn't typically an over feeding amount, but probably using it every day is over kill, try once a week or everytime you change the reservoir.