I'm guessing this is one of those personal preference things. On my 60g freshwater, I will honestly say that aquascaping a 24" height and 12" depth made it pretty difficult to stack anything over 12" and be stable without leaning things against the glass wall which makes me a little nervous.
I'm still deciding whether I'd want to do reef or FOWLR
, but it seems like a lot of the stocking options between 40g and 55g are similar. For freshwater it seemed like a 4' 55g tank really opens up a lot of fish possibilities, but for saltwater seems to be more in the 100g+ range when you can get into surgeons and other bigger fish. I'm ok with that though since I want some of the smaller saltwater species anyway.
I was also wondering if the shorter 40g might be better for lighting for corals and stuff to if I were to go that route eventually...
Macscale, checked our your reef build thread and there is some good information, good pictures and some good info on the stand. I'd probably do a closed stand setup, but still helpful info. Didn't quite make through every post yet on the 23 pages
but I'd see your tank/fish pictures, and your aquascaping on the 55g looks good...
Thanks again, I really appreciate all the info, there's so much to consider! Does Petco do the $1 per gallon sale on tanks over 55g