[Joeymozzer]

I just added wisteria and placed it in front of the heater and filter, I'm wondering if the suction or the heat can limit growth or even burn because of the heater?

Also when rescaping, is it safe to do it with the fish in the tank or can that cause stress?

 

[Betta132]

I think your wisteria will be all right. If it looks a bit unhappy near the filter, you can just move it.
It's generally alright to rescape with fish in there. Yeah, they'll freak out some, but they should be alright. Now, if you're going to stir the sand up a lot, you may want to try and get some out since the water will be gunky.