DIY triple-deck stand?

I don't see why You would need anything more than 2x4's.

I use this rack now for some aquatic snakes:

http://acrochordus.com/homalopsinae/homalopsis/hsetup.htm


The rack is rated for 350Lbs per shelf--spread evenly.

Each tub holds ~12gals and the sump holds ~35gals= ~71gals x 8lbs/gal=~568lbs of water.

Plus the gravel in the sump over the UGF, and all the rocks in each tub. There's well over 600lbs there.

The rack sits on 2 2x4's that run perpendicular to the floor joists (important!), and the sump is further supported underneath it--as can be seen in the pix.

The rack is 48" x 18" which is too big for you needs, but they come in smaller sizes and I offer this just to give you some perspective.

The rack itself can be covered with luan, paneling, etc., or a large skirt. Many things can be done to "pretty" it up and make it more presentable.

Anyway, vertical 2x4 legs with either 2x4 or 2x2 support joists plus some small metal L-brackets should be all You need. If using the 2x2's--just add extra.

HTH

Thanks for the suggestions everyone.

Naja, that's a neat rack, although I'm interested in honing my skills on woodworking, plus it looks like I'd need to drill some holes into the wall which I don't want to do.

jinx, I'm technically in Rancho Cordova, but it's closer to the Rosemont border (East Sac).

My calculations for the weight were:
2.5g x 8 lb/g = 20 lb
5g x 8 lb/g = 40 lb (if I use a 5g...if it's another 2.5g, then 1/2 this).
25g x 8 lb/g = 200 lb
total ~ 260 lb in water alone. (give or take a little, due to displacement from other things)

then you need to add in weight from the canister filter and other filters, lighting, substrate, wood & rocks (though not much), food, meds, etc...and the stand itself....not to mention the glass and weight of the tanks themselves (add maybe 5-10 lbs...)

I was being generous with 500 lbs+. It may only be 400-425 total.

I'm going to try and sketch something up and hopefully the book came today so I can pick up some wood this weekend and at least make the frame.
I'm going to stain or dye the wood, most likely, so I'll settle for birch or pine depending on which is cheaper and looks better.
I'll go 2x4 if you think that would be ok. I was going for overkill, since I would hate to have it collapse and destroy everything, including the carpet and floor.

**I assume I'd be able to just make the basic box (or box on top of box) frame. Then, use plywood for the skin on the sides, back(maybe) and front (except cut-out spot for door).
Then, I may get some moldings to go along the edges, for looks.
I'm debating on whether I was to sell the 25g I have and get a 60P ADA tank for the top shelf. That would look sharp if it all turns out how I'm picturing it.