In my experiance, the roots grow out the bottom of the pots anyway. And they've gone on to grow nicely.
I keep mine in the pots, but submerge the pot completely in my gravel so it's not seen.
With some plants though, you may need to weight them once out of the pot.
i can fuly submerge my pots as i dont have anough gravel and if i ad more my tank will be half full as its so small lol but i think im going to take them out any way
You really don't have to take them out of the pots at all. I've had these two potted plants for more than a year now (idk what they're called) but they seem to thrive either way, whether you take it out of the pot or not. Just seems thats its easier to take care of when you leave it in.