I used the 60gallon because I got it for the cost of "come get it" and figured it was time for the larger water volume. But yes I agree, the foot print is weirdly narrow for the size if the tank.
The 3 fancies just got upgraded from a 40breeder to this 60gallon. Not sure about that big thing in the middle yet. For the cost of free to me I figured I'd toss it in and see what I think about it over the next few days.
I honestly couldn't tell you how much salt I added initially. Bought a 40lb bucket of marine salt and dumped approximately 2/3 of it into the tub. And I haven't actually checked the temp of the tub. It just kind of sits there and does it's own thing.
Spirulina as a beginning food source. Brine shrimp eggs and live baby brine tossed in. And a small bottle ziptied to the side to hatch some eggs separately. Now it's a matter of time to see what happens.