you go from seedliong...maybe 4" pot

to: 1 gallon pot for veg

then: 3 gallon Pot to finish. If you go to big...your roots grow to the bottom and get clusterfucked. you need them to spread out gradually.

I would be careful with that fish fertilizer. you really need a balanced mix...5-5-5,. or 10-10-10...if you don't balance the nutrient levels you will develop deficiencies and possibly nute lockout.

I think that might be an additive. find some water soluble ferts...or; better yet, spend 30 bucks on gh 3-part, or Pure Blend Pro, for flower.

Those product will allow you to grow in soil without anything else.

superthrive is all I would add at transplant. add 1/4 tsp of superthrive per gallon of water, and water plant. If when you see signs of leaf color change or any droopiness, starts to show...then add ferts.

I'll check back later to see if you did something goofy. LOL big square pots...LOL

Peace