Advice on water soluble fertilizer and hydrolyzed fish

[hawkfish007]

I planted 8 trees (6 various mango varieties, longan, mauritious and sweetheart lychee trees) on south side of my backyard a few weeks ago (9/10-9/15 to be exact). Planted more on the other side of my property as well. All trees are doing fine, I added 6-12" of mulch and layer of cedar on top. I am planning to install a drip irrigation system and use Dosatron D25RE2 to fertilize. I am torn between water soluble fertilizer and  hydrolyzed fish fertilizer from Aqua Power my local Crop Services Store recommended. I was thinking of an all-in-one fertilizer and leaning towards hydrolyzed fish. Do you guys have suggestions and advice for me?

Thanks.