How many people do you know that get sick every time they go out on their deck? Seriously you gotta think before fear mongering. The chances of someone getting sick because they built an aquarium stand out of treated wood are probably lower than what people normally use it for which is deck and picnic tables that they eat on and sun bath on.
Lets also discuss warping since people made a big deal out of it. Sure any wood over time can warp. But the worst warping happens because of differences in moisture and that can just as easily happen on kiln dried lumber. Because if you are using it on an aquarium what do you think is going to happen? It will receive uneven attack from moisture. But that doesn't stop people because a properly secured piece of lumber of anytype will be braced and screwed together such that it will resist warping.
Most of the aquarium stand I have seen over the years have mold issues, often black mold but you don't see people freaking out about that but that can actually mess you up. I know multiple people who have had serious health issues due to black mold, I don't know anyone who was harmed by treated lumber.
The real issue here is just that treated lumber is more expensive so unless its scrap laying around most people wont pay extra money to build anything indoors out of treated lumber.
Sorry but it's not the same as using PT outside. Outside it is exposed to sun which dries out the top layer.
Outside the fumes from ACQ are dispersed. Not true in most homes especially newer, tighter homes.
Did you do the research on the new types of PT? I did. I also did on CCA and fought for its removal. And no, I am not an ecological activist but CCA was that bad. Jury is still out on ACQ and truthfully I haven't seen many reports where the wood industry wasn't funding them behind the scenes.
BTW Fear mongering? The CCA did make people sick. It did contaminate soil. This new stuff hasn't been in common use long enough to see the full effect. But thye do still recommend you DO NOT use it for raised beds in vegetable gardens. They MSDS also says to wear appropriate protection when cutting. I've put the link to the MSDS in an earlier post.
Why don't you hear about people getting sick? Well you really aren't as exposed to the PT outdoors as much as you are indoors. Pretty simple math really.
Warp on PT? I've got 4 4 x 4 posts on my fish house shed. All properly secured. It has twisted. There is no way to avoid it. It warps more than kiln dried. Period.
BTW down here PT is cheaper than non treated. But we are also home to Robbins Lumber which is one of the companies that treat the wood for HD and others.
You'd be better advised to use a decent untreated wood and add a coat or three of poly. That is a film forming finish so it is in effect sealed in plastic.
I don't believe that "touching treated wood" presents any health issues unless it is to a pet or a small child. Then the issue is that they don't wash after touching the treated wood, but get the residue in their mouth. Pets can gnaw on the wood, but how many pets actually do that? The risk of using treated wood indoors is small, but totally unnecessary, so why do it?
How many adults do exactly the same thing? take it a step further and instead of an aquarium stand it's a table. How many times, as an adult, do you touch the kitchen table then eat a sandwich? Do you wash your hands after you touch the table? Why would you expect you would wash after touching a PT table?