@Z... 400 gallons for one silver? that's a bit excessive, I think 200g for one is a fair estimate I dont nee many getting longer than 28" in the hobby so a 7x2 tank would be the minimum. HOWEVER, @OP you're ganna need 400-500g for all of those together
Speaking from actual experience, a 28" silver in a 7x2' tank is not suitable. Minimum at least 3x the length and 1x the width. You dont see many getting longer then 28"? Why, is it just cause you dont look?



