Yes, no problems unless you have added some sort of special chemicals to it.

Dave

Very good for your plants.

If you're already running fish tanks & pumps, you might consider an aquaponics system for growing veggies.

Found out most of the tank is chemical treated.
So I think I'll stay away from those.

One of my tank which hold random fish does not have chemical substance in it.
It is quite murky and you can see feces all over the bottom.
One of them, less murky and is used to grow tons of aquatic plants.

I assume those 2 would be safe to grow vegetable in?

I'm very new to this myself. Just can't get over the facts dirty water contain so much good foods for the plants!

Oh yes, fish water, especially dirty, poopy, fish water is great for gardens. I have had gardens since childhood, and also aquariums, and always put the water change water on plants. I use this to water my vegetable seedling starts exclusively until they go outside.

I would put it on my vegetable garden outside, but it is too far to carry buckets, so my hostas get it once I put my seedlings in the garden,

I can't think of any aquarium chemicals for FRESHWATER aquariums that would be an issue, with the exception of treatments for disease or parasites. I would avoid that tank water for a while.