IMHO I don't see any reason for getting rid of the aquarium. Several posters have already given you great suggestions that would eliminate the danger. Another thought might be to break it down to two or three smaller tanks that can be put in more convenient areas around the house.
I get the feeling that maybe it's less of a safety issue for you and more likely that you just don't want to keep it. Is your DH good about caring for the fish and keeping the tank clean? Or is he spending too much money or time on it? Could it be that he's dumping all the work on you?
A lot of people manage to maintain both having aquariums and raising small children without it causing any problems at all. I really think that if you actually wanted to find a way to keep it, you would.
Sure they do, but I imagine not all are working with our space constraints.
The thing is, I like the fishtank. DH has always kept it up nicely so it doesn't smell, which would
be a problem. I like to look at the fish swirling around serenely. I would be very happy if most of the fish (well, at least half) stayed in a smaller tank. Or two; we could fit one on the bookshelves. What I am not willing to do is spend all day pulling the Nom off of it. I've been doing that a few months and I am totally done.
Well, sure. They could renovate the house, perhaps at a cost of thousands of dollars, to provide a space for the tank. Or, they could sell the house they've just bought and purchase a new one (again, probably costing them thousands of dollars). I suspect that the OP and her husband have already discounted those possibilities.
It sounds like the OP's husband simply expects that the OP will spend her entire day in permanent vigilance against fish raids. And that is not possible to make 100% effective. It would be like leaving a gaping hole in the living room floor, and telling the OP that it's really no problem, she just has to make sure that Nom doesn't fall in.
It's a rental, actually - and I doubt the owner would be pleased if we started building!
Here's the thing. When we looked at the house, we realized that certain concessions would have to be made. We would have to put our beloved, but rickety, cabinets in storage for a few years. We'd have to find someplace to keep the wine rack (downstairs bathroom - really) other than the kitchen. We'd have to store a lot of our art, because there is very little wall space. And we talked about the fishtank, and decided, together,
that it wasn't going to fit. It's only now, one day before we move,
that he's gotten cold feet and decided he wants to keep it. That's the most frustrating thing for me - we'd already talked about this! Numerous times! I tend to think that if he was OK with it last month, then suddenly springing this deep devotion to the fishtank on me now
is rather unfair.