War Of Brown Algae

I read lots of different artical about brown algae which are diatoms. New tank syndrom usually get it. Some people say less light will help but others say not enough. Im really lost and confused how to get rid of brown algae. So far i find that oto's really good at clearing up the tank but is there another way without using algae eaters or manually remove them? I seen filter mdeia that can remove silica and phosphrate but will it help?I also wonder will brown algae establish in your filter?I really want to try not using otos because i have puffers in my tank and they are agressive. Already killed several oto's that i bought.the 4 tanks i have all are almost 1 year. Thye are 2x 10 gal and 2x 20 gal(long) I do regualr 50% water change. heavily planted tank. Dosing excel everyday and add ferts once a week which is after my wc.