Marnee
Fish Fanatic
In a 50 gallon, 4ft long tank, with 2 large swords, 3 small swords, 10 val, 4 large crypts how often and how many root tabs would you use. How far apart do you spread them? Sand substrate. Plants are scattered.
It really really depends on which root tabs.
In my experience plants such as swords could easily have one tab under/close to each plant, always put the tabs close to plants otherwise there is no point. I would easily go through 6-8 in your tank but i use API