Thats a nice transition
from an invasive fastgrower to relative demanding slow grower like the pogo helferi.. Looking at it from that angle and having algae it maybe not the best choice to make.. you need fast growers to compete with algae.
I've lost track, but i think got about 20 different plant species in my tank now, all doing very good, but the helferi is the only one showing signs of trouble. All melted away and only got 3 tiny shoots left, which i actual only see getting smaller over time instead of growing. Tried about everything from extra micros to root tabs, changing location for more light, but stil Helfi is not satisfied. There must be something it wants i don't have what all other plants don't mind not having.
I have the feeling it's a light issue and Helfi is very light demanding, also had to combat algae and lowered the light period and intensity. Algae pressents and growth is down to 90% and relatively forced to a standstill. Still if i up the light i see the staghorn coming to live again in les then 3 days time where the light hits the most, if i go down again it's gone again in 3 days.
The uprooting woont cause you extra algae, it may cause some spikes in water chemistry, for that you got water changes. but swapping a fast grower for a difficult slow grower maybe will.
Getting the light down prevents algae growth but also doesn't help Helfi to establish. I don't know your real time situation so the only advice i can give is, think twice..
If you're persistant in wanting to try the helferi, maybe the best choice is to get it via "for sale/swap/wanted" from an other tank keeper
so you get one already used to submersed growth.