When to toss in some Fish Fertilizer, etc/. (pic)

So I have three girls (I hope) and two of the three seem to be doing well.

They are about two months old and round about this time I start supplementing with Fish Fertilizer or the like, to keep the nutes up. I believe that is just some fish crap which you mix with water for watering cycles. Using sparingly.

Also have been thinking about using some Blood Meal -- anyone using this? Don't think i need to use both, as could result in some nute burn, right?

Use every so often up until the flowering stage, where then you flush for a couple of weeks with just water.

That seem correct? Thoughts?

Blood meal is mostly N which you look deficent in

Fish meal has several different NPK formulations depending on manfacture

I would give them a medium dose of either since they bolth have N , then repeat with 1/2 dose the following week , and then every other week untill the N deficency clears up

I would water them with alaskan fish fertilizer at 1 tbsp per gallon if you can. Get some of that deep green back in the leaves. It takes a few days to work but it will make those plants a lot healthier.

When using soluble fertilizers like fish emulsion, water your plants before applying the ferts. This avoids a thirsty plant gulping up a lethal dose.