New shelving unit

[Jason A.]

So my black Friday purchase was this husky shelving unit Model #426007 I need more tanks and this unit with the center bracing and 1000lbs per shelf seemed to be the best option. The unit is 48"x24"x78".

Now my dilemma is when I set it up how many inches should there be between the lip of the tank and the bottom of the shelf above it? I was thinking about some 10g and 20g tall tanks, don't think 20long will fit unless I place them sideways. 

If anyone has any other suggestions and or advice please don't hesitate to share.

[StevesFishTanks]

on my racks I usually try to go no less than 7" for tanks like 20 talls, on 10g and 20 longs you can do less like 5" or 6" as a minimum.